Apparatus in a receiver includes error detection circuitry for detecting segments of transmitted encoded image data having non correctable errors. Further apparatus generates error maps for respective frames in the transmitted sequence. Responsive to the data in the error maps, known good image data or interpolated image data is substituted for data corresponding to the segments containing errors. Error indications for anchor frames, from which predictive frames are encoded, are propagated into ...

MPEG data is compressed by obtaining difference values between succeeding adjacent data values of MPEG video data and store the difference value if the difference value is less than a predetermined range. By storing the difference values rather than the data values if the difference value is less than a predetermined range, compression may be provided for MPEG data. More specifically, a series of data values of MPEG video data is separated from an MPEG bitstream. Difference values are obtained b...

A difference vector determination element used in an apparatus for coding motion vector includes register memories (PMV) of which number is equal to sum of maximum transmission numbers N and M of forward predictive and backward predictive motion vectors. Motion vector counter counts the number of transmission of motion vectors to output a motion vector count signal. Register index designation signal generator designates indices of (1.about.N (N+1).about.(N+M)) in order of transmission of forward...

A digital signal decoder system is provided for receiving digital video signals and processing them while reducing the external memory requirements for frame buffer storage for an MPEG-2 decoder through decimation. The system includes an expansion filter, such as a polyphase finite impulse response (FIR) horizontal filter for re-expanding decimated macroblock data to original form. This expansion filter is a variable filter which automatically adjusts expansion of the decimated macroblock data u...

A video signal layering-encoding system according to the present invention has at least either a frequency distribution unit to judge a frequency distribution in an input video signal or a motion judgment unit to judge the motion of an input video signal. With this, encoding quantity control according to the characteristics of the input video signal can be performed between layers. Also, with selection of encode modes and sharing of a motion vector, the encoded data of a bidirectionally predicte...

A commercial candidate section detector detects a commercial candidate section on the basis of a quiet section and a scene change point. A commercial characteristic quantity detector judges whether the commercial candidate section has various characteristics of commercials, and adds a predetermined value to an commercial characteristic value on the basis of the judgment result. The commercial characteristic quantity detector compares the final commercial characteristic value with a predetermined...

A moving picture coding apparatus and method with improved predictability of a moving picture to be subjected to interframe prediction to obtain an improved quality of a coded picture. In a moving picture coding apparatus for performing interframe motion compensated prediction for applying intraframe coding, interframe forward predictive coding and interframe bidirectional predictive coding to code each frame, by determining a prediction frame interval of frames to be subjected to forward predic...

In a block-based video stream, a first bit representing video data at a predefined location is identified. The video data at the first bit is replaced with a bit of non-video data prior to being transmitted to a device used to process the block-based video stream. Additional bits of non-video information are transmitted by replacing additional bits of video data within the block based video stream. A processing device that receives the block-based video stream accesses the non-video bits to obta...

A moving picture expansion method and apparatus is disclosed wherein, when expansion processing of a frame is conducted, if the frame is a B picture and the next frame is also a B picture, expansion processing of the adjacent two frames is simultaneously conducted by alternately repeating expansion processing for one macro block of the first frame and expansion processing for one macro block of the second frame and, when expansion processing of a frame is conducted, if the frame is a B picture a...

A decoder system having a motion compensation system that scales the processing of B pictures in order to save computational resources. The motion compensation system has a first scaling system that includes comparing a motion vector magnitude of each macroblock in a B picture with a predetermined threshold. A system for performing a routine decoding operation for each macroblock in which the motion vector magnitude is greater than the predetermined threshold and a system for copying a correspon...