 |
Claims  |
|
|
What is claimed is:
1. In a television system including tuner means for selecting RF signals
modulated with picture information corresponding to respective channels;
channel selection means for controlling said tuner means including digit
switches for selecting channels; demodulation means for demodulating said
RF signals to generate a video signal corresponding to said picture
information; first coupling means for coupling said video signal to a
display device having a screen for displaying an image corresponding to
said picture information; and a scheduler including memory means for
storing time (including time of day and date) and channel information
corresponding to respective programs occurring in the future; clock means
for indicating the present time; and scheduler control means for causing
said channel selection means to select the channel corresponding to one of
said programs when the present time corresponds to the starting time of
said one of said programs; programming apparatus for allowing a user to
program said schedule in a plurality of programming modes including at
least a clock setting mode, a normal mode for scheduling programs for
selection only once and a daily mode for scheduling programs for selection
on a daily basis, comprising:
character generator means for generating character signals suitable for
displaying alpha-numeric characters on said screen of said display device;
second coupling means for coupling said character signals to said display
device;
a user operable programming switch; and
programming control means responsive to the operation of said programming
switch for causing said character generator means to generate character
signals for displaying a numbered list of said programming modes and for
enabling said digit switches to select said programming modes and
thereafter being responsive to the operation of one of said digit switches
for causing said character generator to generate character signals for
displaying prompting instructions for guiding a user to operate said digit
switches to enter numerical information for a respectively numbered one of
said programming modes.
2. The combination recited in claim 1, wherein:
said television system is a video tape recorder.
3. The combination recited in claim 2, wherein:
said first coupling means includes modulation means for converting said
video and character signals to a correspondingly modulated RF carrier; and
said second coupling means is coupled to said first coupling means and
thereby to said display device.
4. The combination recited in claim 1, wherein:
said program switch and said digit switches are incorporated in a remote
control transmitter which generates remote control coded messages in
response to their operation; and
said programming control means is responsive to said remote control
messages to control said character generator means.
5. The combination recited in claim 1, wherein:
said prompting instructions include a descriptive title of the selected
programming mode.
6. The combination recited in claim 5, wherein:
said prompting instructions include blanks corresponding to the numerical
information to be entered; and
said programming control means is responsive to the operation of said digit
switches after the generation of said character signals for displaying
said prompting instructions for generating character signals for
displaying the digits corresponding to said operated digit switches in
place of said blanks.
7. The combination recited in claim 6, wherein:
said programming control means is responsive to a second operation of said
program switch to terminate the programming operation.
8. The combination recited in claim 7, wherein: said scheduler programming
arrangement further includes a user operable clear switch; and said
programming control means is responsive to the operation of sald clear
switch for canceling said character signals for displaying the digits
corresponding to ones of said digit switches operated after the generation
of said character signals for displaying said prompting instructions.
9. The combination recited in claim 8, wherein:
said program switch, said digit switches and said clear switch are the only
user operated control devices provided for programming said scheduler.
10. The combination recited in claim 9, wherein:
said program control means includes a microprocessor under the control of a
stored program.
11. The combination recited in claim 9, wherein:
said television system is a video tape recorder.
12. The combination recited in claim 9, wherein:
said first coupling means includes modulation means for converting said
video and character signals to a correspondingly modulated RF carrier; and
said second coupling means is coupled to said first coupling means and
thereby to said display device.
13. The combination recited in claim 9, wherein:
said program switch, said digit switches and said clear switch are
incorporated in a remote control transmiter which generates respective
remote control coded messages in response to their operation; and
said programming control means is responsive to said remote control
messages to control said character generator means.
14. In a video recorder including tuner means for selecting RF signals
modulated with picture information corresponding to respective channels;
channel selection means for controlling said tuner means including digit
switches for selecting channels; demodulation means for demodulating said
RF signals to generate a video signal corresponding to said picture
information; recording means for recording said video signal obtained from
said demodulation means; playback means for recovering recorded video
signals recorded; output means for coupling one of said video signals
obtained from said demodulation means or said playback means to a display
device having a screen for displaying an image corresponding to said
picture information; and a scheduler including memory means for storing
time (including time of day and date) and channel information
corresponding to respective programs occurring in the future; clock means
for indicating the present time; and scheduler control means for causing
said channel selection means to select the channel corresponding to one of
said programs when the present time corresponds to the starting time of
said one of said programs; programming apparatus for allowing a user to
program said scheduler in a plurality of different programming modes
including at least a clock setting mode, a normal mode for scheduling
programs for recording only once and a daily mode for scheduling programs
for recording on a daily basis, comprising:
character generator means for generating character signals suitable for
displaying alpha-numeric characters on said screen of said display device;
coupling means for coupling said character signals to said output means;
a user operable programming switch; and
programming control means responsive to the operation of said programming
switch for causing said character generator means to generate character
signals for displaying a numbered list of said programming modes and for
enabling said digit switches to select said programming modes and
thereafter being responsive to the operation of one of said digit switches
for causing said character generator to generate character signals for
displaying prompting instructions for guiding a user to operate said digit
switches to enter numerical information for a respectively numbered one of
said programming modes.
15. The combination recited in claim 14, wherein:
said output means includes modulation means for converting said video and
character signals to a correspondingly modulated RF signal.
16. The combination recited in claim 14, wherein:
said program switch and said digit switches are incorporated in a remote
control transmitter which generates respective remote control coded
messages in response to their operation; and
said programming control means is responsive to said remote control
messages to control said character generator means.
17. The combination recited in claim 14, wherein:
said prompting instructions include a descriptive title of the selected
programming mode;
said prompting instructions include blanks corresponding to the numerical
information to be entered;
said programming control means is responsive to the operation of said digit
switches after the generation of said character signals for displaying
said prompting instructions for generating character signals for
displaying the digits corresponding to said operated digit switches in
place of said blanks;
said programming control means is responsive to a second operation of said
program switch to terminate the programming operation;
said scheduler programming apparatus further includes a user operable clear
switch; and
said programming control means is responsive to the operation of said clear
switch for cancelling said character signals for displaying the digits
corresponding to ones of said digit switches operated after the generation
of said character signals for displaying said prompting instructions.
18. The combination recited in claim 17, wherein:
said program switch, said digit switch and said clear switch are the only
user operated control devices provided for programming said scheduler
arrangement.
19. The combination recited in claim 18, wherein:
said program switch, said digit switches and said clear switch are
incorporated in a remote control transmiter which generates respective
remote control coded messages in response to their operation; and
said programming control means is responsive to said remote conrol messages
to control said character generator means.
20. In a television system including tuner selection means for selecting RF
signals modulated with picture information corresponding to respective
channels; channel selection means for controlling said tuner means
including digit switches for selecting channels; demodulation means for
demodulating said RF signals to generate a video signal corresponding to
said picture information; first coupling means for coupling said video
signal to a display device having a screen for displaying an image
corresponding to said picture information; and a scheduler including
memory means for storing time (including time of day and date) and channel
information corresponding to respective programs occurring in the future;
clock means for indicating the present time; and scheduler control means
for causing said channel selection means to select the channel
corresponding to one of said programs when the present time corresponds to
the starting time of said one of said programs; programming apparatus for
allowing a user to program said schedule in a plurality of programming
modes including clock setting mode, a normal mode for scheduling programs
for selection only once, a daily mode for scheduling programs for
selection on a daily basis and a weekly mode for scheduling programs for
selection on a weekly basis, comprising:
character generator means for generating character signals suitable for
displaying alpha-numeric characters on said screen of said display device;
second coupling means for coupling said character signals to said first
coupling means and thereby to said display device;
a programming switch;
a clear switch;
programming control means responsive to the operation of said programming
switch for causing said character generator means to generate character
signals for displaying a numbered list of said programming modes and for
enabling said digit switches to select said programming modes; and after
the generation of characters for displaying said numbered list of said
programming modes being responsive to the opeation of one of said digit
switches for causing said character generator to generate character
signals for displaying prompting instructions for guiding a user to
operate said digit switches to enter numerical information for a
respectively numbered one of said programming modes, said prompting
instructions including a descriptive title of the selected programming
mode and blanks corresponding to the numerical information to be entered;
and after the generation of said character signals for displaying said
prompting instructions, being responsive to the operation of said digit
switches for displaying the corresponding digits in place of said blanks;
said programming control means being responsive to the operation of said
clear switch for cancelling said character signals for displaying the last
entered digit; said programming control means being responsive to a second
operation of said programming switch to terminate the programming
operation of said scheduler.
21. In a television system including input selection means for selecting
one of a plurality of television signals each representing respective
picture information, input selection control means for controlling said
input selection means including numbered switches for selecting said one
of said television signals; first coupling means for coupling said one of
said television signals to a display device having a screen for displaying
an image corresponding to said respective picture inforamtion; and a
scheduler including memory means for storing time and input selection
information corresponding to respective programs occurring in the future;
clock means for indicating the present time; and scheduler control means
for causing said input selection means to select the television signal
corresponding to one of said programs when the present time corresponds to
the starting time of said one of said programs; programming apparatus for
allowing a user to program said scheduler in a plurality of programming
modes, said programming apparatus comprising:
character generator means for generating character signals suitable for
displaying alpha-numeric characters on said screen of said display device;
second coupling means for coupling said character signals to said display
device;
a user operable programming switch; and
programming control means responsive to the operation of said programming
switch for causing said character generator means to generate character
signals for displaying a numbered list of said programming modes and for
enabling said digit switches to select said programming modes and
thereafter being responsive to the operation of one of said numbered
switches for causing said character generator to generate character
signals for displaying prompting instructions for guiding a user to
operate said numbered switches to enter numerical information for a
respectively numbered one of said programming modes. |
|
 |
|
 |
Claims |
|
|
|
Description |
|
|
The present invention concerns a "scheduler" for programming a television
receiver or video cassette recorder to automatically select programs
identified by respective channel numbers and starting and ending times for
future viewing or recording.
Many video cassette recorders (VRCs) and some television (TV) receivers
include a "scheduler" for causing programs occurring at future times to be
automatically selected for recording or viewing. Basically, a scheduler
includes a clock for indicating the present time and plurality of memory
locations in which the starting and ending times and the channel numbers
of corresponding programs have previously been stored during a programming
operation. When a comparator determines the present time has reached the
starting time of a program, the VCR or TV is turned on and the
corresponding channel number is caused to be read from the associated
memory location and used to tune the respective channel. WHen the present
time reaches the ending time, the VCR or TV is turned off.
In the case of a VCR, the programming apparatus has heretofore, for the
most part, included pushbutton switches for selecting respective memory
locations in which the starting and ending times and channel numbers of
the programs are stored. The times and channel numbers are typically
entered by activating digit keys of a calculator-type keyboard. The digit
keys are normally used to select channels. A mode switch may be provided
for selecting various scheduling modes, e.g., including a mode for
recording a program only once, a mode for recording the same program each
day of the week and a mode for recording the same program week after week.
Typically, light emitting diodes (LED) display or a liquid crystal display
(LCD), are used to indicate the various programming operations and to
guide or "prompt" the user to enter scheduling information.
For cost reasons, it is desirable to limit the number of switches and
indicators for controlling a television receiver or VCR. Limiting the
number of control switches is also important if the switches are to be
located on a remote control transmitter unit. To limit the number of
switches, it has been suggested to use the same switches for the
programming operation as are used for normal operations. However, it has
been found that when multi-function use is made of switches, the user can
easily be confused unless detailed prompting information is displayed to
guide the user. In the case of a VCR, the amount of prompting information
that can be displayed is limited because of the limited number of
characters that can be displayed by light emitting diodes or a liquid
crystal display.
In the case of a TV, prompting information for guiding a user during the
programming of a scheduler may be displayed on its screen. Since a very
large number of characters can be displayed, the prompting information may
be provided in great detail. However, prior programming apparatus for a TV
scheduler employing an on-screen display (OSD) character generator for
displaying prompting information still have a relatively large number of
programming switches in addition to the switches required to control the
normal operation of the TV because the manner in which the prompting
information is displayed is not well suited to the multi-function use of
switches for both controlling the normal operation of the TV and
programming its scheduler.
The present invention is directed to an on-screen programming prompting
apparatus for a television system such as a TV or VCR which makes possible
the need for only a single "program" key for initiating and terminating
the programming operation and a number of "digit" keys which are normally
used for channel selection and, possibly, a clear key for cancelling
previously entered information, for programming a scheduler. Specifically,
in accordance with the the present invention, a character generator is
responsive to the activation of a program key to generate character
representative coded signals for displaying on the screen of an image
reproducing device such as, a picture tube, a programming "menu" or list
in which scheduler programming modes, such as e.g., clock setting,
scheduling programs to be selected only once, scheduling programs to be
selected daily and scheduling programs to be selected weekly, have
respective identifying numbers. Thereafter, in response to the activation
of digit keys, corresponding programming modes are initiated. According to
another aspect of the invention, in each programming mode the character
generator is caused to generate character representative coded signals for
displaying step-by-step programming instructions which prompt the user to
activate digit keys in order to fill in displayed blanks for the purpose
of entering the channel numbers and starting and ending times of programs
to be scheduled.
These and other features of the present invention will be described with
reference to the accompanying Drawings in which:
FIG. 1a is a schematic in block form of a video cassette recorder/player
(VCR) including a scheduler and scheduler programming apparatus
constructed in accordance with an aspect of the present invention;
FIG. 1b is a schematic in block form of a television receiver (TV) for use
in conjunction with the VCR shown in FIG. 1 which is useful in explaining
the scheduler programming operation shown in FIG. 1a;
FIG. 2 is a schematic in block form of a microprocessor used to control the
operation of the VCR shown in FIG. 1a;
FIG. 3 shows the keyboard of a remote control transmitter for controlling
the VCR and scheduler programming apparatus shown in FIG. 1a constructed
in accordance with an aspect of the present invention; and
FIGS. 4a through 4g show the flow chart for the stored program by which the
microprocessor shown in FIG. 3 controls the operation of the scheduler
programming apparatus described with reference to FIGS. 1a, 1b and 3.
In FIG. 1a, a source 1, such as a broadcast receiving antenna or cable
network, provides RF carriers modulated with television information
corresponding to various respective channels to an RF input 3 of a video
cassette recorder/player (VCR) 5. The RF signal corresponding to a
particular channel, selected by a tuner control unit 7, is filtered,
heterodyned and demodulated by a tuner and demodulator unit 9 to produce a
composite video signal, including luminance, chrominance and
synchronization components, and an audio signal corresponding to the
selected channel.
In a recording mode of opera-ion, the luminance, chrominance and
synchronization components are processed by a picture recording unit 11
and the resultant components are recorded on a magnetic tape by means of
magnetic heads 13. The audio signal is processed for recording by an audio
recording unit 15 and coupled to heads 13. The tape, contained in a
cassette, is driven past heads 13 by a tape drive unit 17 under the
control of a tape drive control unit 19.
In playback mode of operation, video and audio signals developed by heads
13 from a tape are processed by respective playback processing units 21
and 23 and coupled to an RF modulator 25. Modulator 25 produces an RF
carrier corresponding to a predetermined channel (e.g., channel 3 or 4)
which is modulated with television information corresponding to the
recorded material in the same format as the RF carriers received from RF
source 1. The RF carrier produced by modulator 25 is coupled to an RF
output 27 of VCR 5 from which it can be coupled to a television receiver
(TV) such as TV 29 shown in FIG. 1b.
The RF carrier supplied to TV 29 by VCR 5 is coupled via an RF input 31 to
a tuner and demodulator unit 33, where, under the control of a tuner
control unit 35, it is filtered, heterodyned and demodulated to produce a
composite video signal and an audio signal corresponding to the recorded
material. The composite video signal is processed by a picture processing
unit 37 to form red, green and blue (R,G and B) color signals which are
coupled to electron guns of a picture tube 39. The electron beams produced
by picture tube 39 are swept in a raster by deflection coils 41 in
response to horizontal and vertical deflection signals generated by a
deflection unit 43 to form a picture on the screen of picture tube 39
corresponding to the recorded material. The deflection signals are
generated in response to horizontal (H) and vertical (V) synchronization
signals derived from the composite video signal by a sync separator
portion of picture processing unit 37. The audio signal is processed by an
audio processing unit 43 and coupled to a speaker 47 to produce an audio
response corresponding to the recorded material.
Often television receivers and television monitors (i.e., a television
receiver without a tuner) have direct video and audio inputs such as 49
and 51, respectively, of TV 29 for receiving baseband video and audio
signals from a VCR, home computer or the like. To accommodate such direct
signal inputs, VCR 5 includes direct video and audio outputs 53 and 55
coupled to the outputs of picture and audio playback units 21 and 23,
respectively.
In order that a user may view (and listen to) one program while a different
program is being recorded, a switch 57, usually referred to as a TV/VCR
switch, is provided to couple either RF input terminal 3 of VCR 5 or the
output of RF modulator 25 to RF output terminal 27.
In order that a user may view (and listen to) the same program that is
being recorded, during the recording mode, the video and audio signals
produced by tuner and demodulator unit 9 are coupled to RF modulator 25
through switches 59 and 61, respectively. During the playback mode, the
video signal produced by picture playback unit 21 and the audio signal
produced by audio playback unit 23 are coupled to RF modulator through
switches 59 and 61, respectively.
Switches 59 and 61 have the additional function of decoupling the video and
audio signals produced at the outputs of tuner and demodulator unit 9 and
playback units 21 and 23, from the inputs of RF modulator 25 and direct
outputs 53, respectively, while VCR 5 is in a "stop" mode in which VCR 5
is "on" but the tape and tape heads 13 not in motion, a "fast forward"
mode, in which the tape is being rapidly driven in the forward direction,
in a "rewind" mode, in which the tape is rapidly being driven in the
reverse direction and in a "pause" mode, in which the tape is not in
motion but tape heads are in motion. The stop mode is provided so that
tape motion can be stopped when changing tape direction and between the
recording and playback operations. The pause mode is provided so that the
recording or the playback mode can be temporarily interrupted and then
rapidly reinitiated. The decoupling action may including blanking the
video signal and muting the audio signal. Decoupling the video and audio
signals from the television receiver during the stop, fast forward and
rewind modes prevents the generation of annoying, spurious picture and
audio responses.
Various functions of VCR 5 can be controlled by a user by means of either a
local keyboard 63 mounted on VCR 5 itself or a remote keyboard 65 mounted
on a remote control transmitter 67. Each of keyboards 63 and 65 include a
plurality of normally opened push button switches. Each of the pushbutton
switches is closed when a user pushes an associated key and automatically
returns to the normally opened condition when the user releases the
associated key. When a key of local keyboard 63 is pushed, a corresponding
coded signal is coupled to a microprocessor 69. When a key of remote
keyboard 65 is pushed, a remote control message is transmitted in the form
of a digitally modulated infrared or ultrasonic carrier to a remote
control receiver 71 which converts it to a correspondingly modulated
electrical carrier. Remote control receiver 71 also demodulates the
modulated electrical carrier to form a digital word representing the
remote control message which is coupled in serial form to microprocessor
69.
A main power supply 73, which is selectively couped to the AC line to turn
VCR 5 "on" and decoupled from the AC line to turn VCR 5 "off", supplies
operating voltages to all the units of VCR 5 except to microprocessor 69
and remote control receiver 71. The latter units receive their operating
voltages from a standby power supply 75 which is continually connected to
the AC line.
Microprocessor 69 controls the various operation of VCR 5 described above
including turning VCR 5 on and off, controlling the selection of channels
by way of tuner control unit 7, selecting between the recording and
playback modes by controlling switches 59 and 61 and controlling the
position of TV/VCR switch 57. In addition, microprocessor 69 generates
commands which are coupled to tape drive control unit 17 to select the
speed and direction of tape drive in the recording, playback, stop, fast
forward and rewind modes.
Microprocessor 69 also controls the automatic selection (i.e., the
"scheduling") of programs to be recorded at future times. For this
purpose, microprocessor 69 generates a digital word representing the
present time, including date, hour and minute, by counting cycles of the
output signal of a clock oscillator 77 (or alternative cycles of the AC
line voltage) and has a plurality of memory locations (to be discussed
with respect to FIG. 2) for storing the starting and ending times,
including the date, hour and minute, and channel numbers of programs to be
recorded in the future. At each minute of the present time, the memory
locations are addressed and the respective starting times are examined.
When the present time equals the starting time of a program to be
recorded, microprocessor 69 causes VCR 5 to be turned on by sending a "on"
control signal to main power supply 73, and causes the tuning of
appropriate channel by sending a digital word representing the channel
number of the channel to tuner control unit 7. At this time microprocessor
69 also causes the appropriate signals to be coupled to tape drive control
unit 17 and to recording units 11 and 15 to place VCR 5 in the recording
mode. When the present time equals the ending time of the program,
microprocessor 69 causes VCR 5 to be turned off.
Because of the large number of functions to be controlled by microprocessor
69, only those connections of microprocessor 69 related to the scheduling
function, with which the present invention is specifically concerned, are
shown in FIG. 1.
As shown in FIG. 2, microprocessor 69 includes a central processing unit
(CPU) 201 which receives data from local keyboard 63 and remote control
receiver 71 and supplies data to various portions of VCR 5 through an
input/output (I/O) unit 203. CPU 201 processes the data it receives
according to a control program stored in a read only memory (ROM) 205. For
this purpose, CPU 201 addresses the memory locations ROM 205 and receives
instructions from the addressed memory locations. A random access memory
(RAM) 207 is used to store data, including the scheduling information,
processed by CPU 201. CPU 201 addresses the memory locations of RAM 207 in
order to store new data and to retrieve previously stored data. RAM 207
may be included within the same integrated circuit as the remaining
portions of microprocessor 69 or may be contained in a separate integrated
circuit. The .mu.PD 7591 integrated circuit, including an internal RAM,
commercially available from NEC of Japan is suitable for use as
microprocesor 69.
To the extent so far described, VCR 5 is similar to already commercially
available VCRs such as the model number VJP900 sold by RCA Corporation,
Indianapolis, Indiana and described in RCA Service Data File 1983 for the
VJP900, second edition. The present arrangement departs from prior VCRs in
part because it uses relatively fewer controls for programming the
scheduler. This aspect can be better understood with reference to FIG. 3
which shows the keys of keyboard 65 of remote control transmitter 67.
Local keyboard 63 includes corresponding keys.
As shown in FIG. 3, keyboard 65 includes ON, OFF, TV/VCR, PLAY, RCRD
(ReCoRD), FFWD (Fast ForWarD), RWND (ReWiND) STOP and PAUSE keys for
controlling the VCR functions described above. In addition, keyboard 65
also includes keys corresponding to the digits 0 through 9 which are
normally used to select channels. To select a channel, the user depresses
in sequence, the key corresponding to tens digit of the channel number of
the channel and thereafter the key corresponding to the units digit of the
channel number. The digit keys are also used, as will be explained below,
during the scheduler programming operation. Finally, PRGM (PRoGraM) and
CLEAR keys are provided for initiating and ending the programming
operation and for "clearing" previous entries during the programming
operation, respectively.
There are a number of modes during the programming operation. These are:
1. a "clock set" mode for setting the date, hour and minute of the present
time;
2. a "normal program" mode for scheduling a particular program to be
recorded only once;
3. a "daily program" mode for scheduling a program that occurs at the same
time of day Monday thru Friday to be recorded Monday thru Friday;
4. a "weekly program" mode for scheduling a program that occurs at the same
day of the week and at the same time of the day each week to be recorded
each week; and
5. a "program review" mode for reviewing what has been scheduled.
Even though there are five programming modes, the digit keys and the
PROGRAM and CLEAR keys are the only keys that are required to be operated
by the user for the programming operation.
To enable the scheduler to be programmed in the various modes with only the
PROGRAM, digit and CLEAR keys, VCR 5 includes provisions for displaying
detailed instructions on the screen of an associated television receiver
such as TV 29 or television monitor for guiding the user through the
programming operation in a simple step-by-step procedure. For this
purpose, VCR 5 includes an on-screen display (OSD) character generator 79
for generating signals representing alpha-numeric characters in a video
format suitable for displaying the characters on the screen of a
television receiver or monitor. The MB88303ES integrated circuit
manufactured by Fujitsu of Japan is a suitable for this purpose. Character
generator 79 responds to command signals generated by microprocessor 69 to
generate the character representative signals. Microprocessor 69 is
responsive to the operation of the keys of local keyboard 63 or remote
keyboard 65 to generate the command signals for character generator 79 as
will be explained in detail below.
A synchronization ("sync") signal generator 81 generates horizontal (H) and
vertical (V) sync pulses which are coupled to character generator 79 for
positioning the characters on the screen of a television receiver or
monitor. The character representative signals are coupled by way of a
signal combining circuit 83 to the video input of RF modulator 25. The
normal video signal is also coupled through combining network 83 to RF
modulator 25. Combining network 83 may simply comprise a resistive signal
adder (or matrix). Modulator 25 modulates the RF carrier at the
predetermined frequency with the character representative signals in the
same manner as it does with the normal video signal. In the television
receiver, after demodulation, the character representative signals are
processed in the same manner as normal video signals and the co | | |
