Television – Bandwidth reduction system – Data rate reduction
Patent
1996-01-26
1997-05-06
Britton, Howard W.
Television
Bandwidth reduction system
Data rate reduction
348407, 348423, H04N 750
Patent
active
056275900
ABSTRACT:
An image encoding and transmitting system is an image transmission system for transmitting digital data such as TV telephones. The system for dividing input frame data into a plurality of blocks before transmitting them comprises on its sending side an intra-frame/inter-frame determiner for receiving intra-frame data and inter-frame data and selecting either of them for output, and a difference collator for having the intra-frame/inter-frame determiner compulsorily output intra-frame data at the time of data input for the next frame when one or more data in each block forming inter-frame data are larger than a predetermined threshold. The system also comprises on its receiving side an picture element domain frame data storage for storing received data in the picture element domain, and a motion vector detector for detecting according to the contents in the storage a motion vector using the data in the block surrounding the discarded block in order to guess the data in the discarded block.
REFERENCES:
patent: 4695882 (1987-09-01), Wada
patent: 4807053 (1989-02-01), Heijnemans
patent: 4827339 (1989-05-01), Wada
patent: 4837618 (1989-06-01), Hatori
patent: 4982285 (1991-01-01), Sugiyama
patent: 4989088 (1991-01-01), Wada
patent: 5134477 (1992-07-01), Knauer
patent: 5191446 (1993-03-01), Hamano
patent: 5247363 (1993-09-01), Sun
patent: 5457496 (1995-10-01), Hamano
Masahiro Wada, "Selective Recovery of Video Packet Loss Using Error Concealment", IEEE Journal on Selected Areas in Communication, Jun. 1989, vol. 7, No. 5, pp. 807-814.
Aartsen et al., "Error Resilience of a Video Codec for Low Bitrates", Proceedings of International Conference on Acoustics, Speech and Signal Processing, (ICASSP 1988), Apr. 1988, pp. 1312-1315.
Haskell et al., "Resynchronization of Motion Compensated Video Affected by ATM Cell Loss", Proceedings of ICASSP 1991, Mar. 1992, pp. III-545-III-548.
Voeten et al., "Integrating Video Codecs in ATM Networks", Proceedings of the International Switching Symposium, May 1990, vol. VI, pp. 25-28.
Jain et al., "Displacement Measurement and its Application in Interframe Image Coding", IEEE Transactions on Communications, Dec. 1981, vol. 29, No. 12, pp. 1799-1808.
Nomura et al., "Layered Coding for ATM Based Video Distribution Systems", Signal Processing Image Communication, Sep. 1991, vol. 3, No. 4, pp. 301-311.
Takashi Hamano et al, VISICOM '93, 5th International Workshop on Packet Video, Japan.
B. Loret et al., Packet Video 1990, 2 Layer Coding Schemes Based on H.261 for ATM Networks, France.
Katsutoshi Manabe et al., Packet Video 1990, Variable Bit-Rate Coding of Video Signals for ATM Networks, Japan.
Hamano Takashi
Matsuda Kiichi
Sakai Kiyoshi
Britton Howard W.
Fujitsu Limited
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