초록 ▼

The method and system of compressing digital color video data in a video communication system utilizes a digital color video signal having three video color components, and the encoding of the color components as compressed color codes in a series of run length and compressed color code combinations

The method and system of compressing digital color video data in a video communication system utilizes a digital color video signal having three video color components, and the encoding of the color components as compressed color codes in a series of run length and compressed color code combinations. A look up table of compressed color codes representing the most visually significant combinations of three color components may also be modified by a process which involves the determination of a predetermined number of the most visually significant combinations of color components in a picture frame. Line-to-line differences and movement of edges and segments of the picture frames are determined, and frame-to-frame differences are also encoded to reduce the amount of information to a minimum. Further statistical encoding of at least a portion of the run length and color code combinations is also provided.

대표청구항 ▼

A method of compressing digital color video data in a video communication system for transmitting a plurality of video picture frames, with each picture frame comprising a plurality of scan lines composed of a plurality of pixels, utilizing a digitized color video signal having three digital color c

A method of compressing digital color video data in a video communication system for transmitting a plurality of video picture frames, with each picture frame comprising a plurality of scan lines composed of a plurality of pixels, utilizing a digitized color video signal having three digital color components, said system including means for determining a luminance function for each pixel, means for determining which of said pixels on each scan line represent decision points based upon said luminance function, and means for encoding at least a portion of said plurality of pixels in each scan line as a plurality of combinations of run lengths and said three digital color components, said run length being of a first digital word size, and said three digital color components being of second, third and fourth digital word sizes, respectively, comprising the steps of: (a) encoding all of said digital color components in said picture frame according to a look up table in a memory means of digitally compressed color codes of the most visually significant color combinations of a fifth digital word size smaller than the sum of said second, third and fourth digital word sizes; and (b) encoding a plurality of run lengths and said digitally compressed color codes representing at least a portion of said picture frame in said memory means.