1
Robert D Widergren, Wen Hsiung Chen, Stanley C Fralick, Andrew G Tescher: Digital video compression system and methods utilizing scene adaptive coding with rate buffer feedback. Compression Labs, David B Harrison, November 24, 1981: US04302775 (420 worldwide citation)

A digital video compression system and its methods for compressing digitalized video signals in real time at rates up to NTSC color broadcast rates are disclosed. The system compressor receives digitalized video frames divided into subframes, performs in a single pass a spatial domain to transform d ...


2
Robert D Widergren, Wen Hsiung Chen, Stanley C Fralick, Andrew G Tescher: Digital video compression system and methods utilizing scene adaptive coding with rate buffer feedback. Compression Labs, David B Harrison, July 19, 1983: US04394774 (275 worldwide citation)

A digital video compression and expansion system and its methods for compressing and expanding digitalized video signals in real time at rates up to NTSC color broadcast rates are disclosed. The system compressor receives digitalized video frames divided into subframes, performs in a single pass a s ...


3
Andrew G Tescher: Video bandwidth reduction system employing interframe block differencing and transform domain coding. Compression Labs, Fliesler Dubb Meyer & Lovejoy, September 10, 1985: US04541012 (112 worldwide citation)

Video type information signals are compressed for transmission and reproduction by comparing corresponding blocks of time domain information signals from successive fields, converting a block of the time domain information signals to a transform domain signal represented by discrete cosine transform ...


4
Robert D Widergren, Wen Hsiung Chen, Stanley C Fralick, Andrew G Tescher: Discrete cosine transformer. Compression Labs, David B Harrison, May 24, 1983: US04385363 (86 worldwide citation)

An improved method and apparatus for calculating discrete cosine transform coefficients from a plurality of digitalized data is disclosed. The pipelined processor utilizes two basic types of circuits arranged in five computational stages. Shuffle and add circuits operate upon prearranged data compon ...