Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
192 words
An error correction system in a picture transmission system in which a moving picture frame is inter-frame coded, and a coded moving picture signal is divided into transmission blocks for transmission, said error correction system comprising: a receiver side having a decoder for decoding picture blocks to provide a video output signal, means for recognizing a transmission block loss in transmission, means for calculating an area in picture frames affected by said lost transmission block, means for supplying said decoder with provisional compensation data for an area which is effected by loss of a transmission block, and means for information a transmitter side about said picture area affected by the loss of the transmission block; a transmitter side having an encoder for encoding an input video signal using an information suppression technique, means for identifying an affected picture area in a picture frame which has been already transmitting upon receipt of information about the loss of the picture area by said receiver side, means for calculating propagation of the affect by said lost picture area to a succeeding picture frame, and said encoder coding said succeeding frame without using said affected areas.
Claim 2
Dependent Claim
192 words
An error correction system in a picture transmission system in which a moving picture frame is inter-frame coded, and a coded moving picture signal is divided into transmission blocks for transmission, said error correction system comprising: a receiver side having a decoder for decoding picture blocks to provide a video output signal, means for recognizing a transmission block loss in transmission, means for calculating an area in picture frames affected by said lost transmission block, means for supplying said decoder with provisional compensation data for an area which is effected by loss of a transmission block, and means for information a transmitter side about said picture area affected by the loss of the transmission block; a transmitter side having an encoder for encoding an input video signal using an information suppression technique, means for identifying an affected picture area in a picture frame which has been already transmitting upon receipt of information about the loss of the picture area by said receiver side, means for calculating propagation of the affect by said lost picture area to a succeeding picture frame, and said encoder coding said succeeding frame without using said affected areas.
Claim 3
Dependent Claim
45 words
An error correction system in a picture transmission system according to claim 1, wherein said transmitter side has a propagation table for each coded picture frame indicating the affected picture area on the succeeding frame by indicating a certain picture area in the picture frame.
Claim 4
Dependent Claim
38 words
An error correction system in a picture transmission system according to claim 1, wherein each transmission block has a serial number, and loss of the transmission block is recognized on said receiver side by testing said serial number.
Claim 5
Dependent Claim
34 words
An error correction system in a picture transmission system according to claim 1, wherein said receiver side has a memory storing a preceeding picture frame for supplying said decoder with said provisional compensation data.
Claim 6
Dependent Claim
36 words
An error correction system in a picture transmission system according to claim 4, wherein a gate is provided for switching an input to said decoder between a received transmission block and an output of said memory.