A data processing apparatus for encoding data in which first information data from a first source of information data is supplied together with a reference timing value and subsequently a plurality of successive sources of information data of a predetermined processing unit are input when said first information data is finished being supplied. The data processing apparatus produces an encoding start point for the successive sources of data, as a function of a phase difference value between a pre...

A synchronizing signal generating apparatus generates a synchronizing signal from digital data in which a synchronizing signal formed of a fixed data pattern having a predetermined bit number is inserted at a predetermined time interval L. The synchronizing signal generating apparatus is comprised of a delay circuit for obtaining a plurality of digital data having a delay time of n times (n is a positive integer) as long as the predetermined time interval L by delaying the digital data at the un...

A data recording and reproducing apparatus for recording and reproducing video signals in a plurality of formats with different rates to/from a record medium is disclosed. In the data recording and reproducing apparatus, a video signal in a selected format is converted into video data packets and audio data packets whose lengths are optimally designated corresponding to the selected format. With a video data packet and an audio data packet, a video sync block and an audio sync block whose length...

An encoding method and apparatus in which, in assigning bits to compressed video data recorded across plural recording areas or layers, bit assignment is evaluated as to whether or not non-permissible difference in picture quality is not produced under given encoding conditions, from one recording area or layer to another, and an optimum condition is presented. The bit assignment is done from one encoding unit to another responsive to the encoding difficulty corrected responsive to the as-change...

An audio signal encoding apparatus is constructed by: means for separating an input audio signal into a plurality of hierarchical data on the basis of a frequency; a plurality of encoding means for respectively encoding the plurality of hierarchical data; and error correction encoding means for adding an error correction code to an output of each of the plurality of encoding means, wherein the error correction encoding means raises error correcting ability which is caused by the error correction...

The present invention is directed to a digital data error correcting apparatus in which an error correction capability can be considerably improved in a digital signal transmission system when a digital modulation code is decoded. In a minimum distance decoding method, when a plurality of reference samples having equal minimum Hamming distance relative to a digital modulation code exist, on the basis of the probability that an error will occur in the respective bits, respective bits are weighted...

The present invention is concerned with a magnetic recording apparatus, such as a video tape recorder, in which the recording circuit, provided with an amplifier connected to a magnetic head, is provided on the side of a rotary head drum. The record control signals for controlling the recording circuit are indicated by serial data and data enable signals indicating the data start and data end points of the serial data. The edge pulses of sync clocks of the serial data are gated by the data enabl...

A digital modulation system is disclosed in which a string of input data is divided at intervals of 8 bits and the resulting 8-bit data words are converted into 16-bit modulated digital code data words. Code conversion is made so that the resulting 16-bit modulation code words have two or more consective digits between the 2nd and the 15th bits, five or less consecutive digits between the 1st and the 16th bits, four or less consecutive digits between the 13th and the 16th bits, the absolute valu...

A digital audio signal processing apparatus for creating coded edited data by insertion of second coded audio data coded in block units not synchronized with frames and fields into first coded audio data coded in block units also not synchronized with the frames and the fields at a request made by a command signal synchronized with the frames or the fields comprises coding means for creating the first and second coded audio data, and switching means for receiving the first and second coded audio...

A digital code modulation circuit converts input data formed of sequentially received serial data into parallel data such that each parallel data has input data for reference in both preceding and following parallel data, and thereupon applies a code conversion to the parallel data and thereby executes modulation of the input data in parallel. Conversely, a digital code demodulation circuit applies a code conversion to input data formed of serial data sequentially input thereto to form parallel ...