05270832 is referenced by 101 patents and cites 5 patents.

A digital video compression system and an apparatus implementing this system are disclosed. Specifically, matrices of pixels in the RGB signal format are converted into YUV representation, including a step of selectively sampling the chrominance components. The signals are then subjected to a discrete cosine transform (DCT). A circuitry implementing the DCT in a pipelined architecture is provided. A quantization step eliminates DCT coefficients having amplitude below a set of preset thresholds. The video signal is further compressed by coding the elements of the quantized matrices in a zig-zag manner. This representation is further compressed by Huffman codes. Decompression of the signal is substantially the reverse of compression steps. The inverse discrete cosine transform (IDCT) may be implemented by the DCT circuit. Circuits for implementing RGB to YUV conversion, DCT, quantization, coding and their decompression counterparts are disclosed. The circuits may be implemented in the form an integrated circuit chip.

Title
System for compression and decompression of video data using discrete cosine transform and coding techniques
Application Number
494242
Publication Number
5270832
Application Date
April 14, 1992
Publication Date
December 14, 1993
Inventor
James Kirkpatrick
San Jose
CA, US
Steve Purcell
Mountain View
CA, US
Alexandre Balkanski
San Franciso
CA, US
Agent
Skjerven Morrill MacPherson Franklin & Friel
Assignee
C Cube Microsystems
CA, US
IPC
H04N 1/04
H04N 1/415
View Original Source