Abstract: A compressed video system and method enhances the visual perception of motion for frame rates below 24 frames per second by intentionally introducing a motion smearing for the moving parts of displayed images. The system uses a frame or field buffer between the decompressor and A to D converter that averages the combination of the current frame or field digital video signal values and a progression of decreasing values of previous frame or field elements. Better (e.g. less jerky) moving images with reduced noise generation can be achieved with lower bit rates or bandwidth than with prior systems.

Abstract: A system and method for increasing the color or luminance gray scale levels from, for example 16 to 32, without increasing the transmission bit rate to produce sharper images with less band width requirement. An error level or pedestal is added to the analog signal of each pixel or every other video unit, such as a line. After decompression, the digital signals of one unit are added to those of the adjacent unit--pixel by corresponding pixel--to yield double the gray scale levels but for a signal twice the proper value. The signal value is then divided by two, yielding a signal of the proper value but at twice the number of possible gray scale levels. In 4-bit video, the result is to convey 5-bit video with the use of two adjacent transmitted 4-bit words and to generate the 5-bit word in the post processor after decompression.