A perceptual compression and robust bit-rate control system

Details A perceptual compression and robust bit-rate control system A perceptual compression and robust bit-rate control system

G - Physics

06

F

G06F 17/10 (2006.01) H04N 7/26 (2006.01) H04N 7/30 (2006.01)

Patent

CA 2250284

A method of compressing a source (e.g., a video signal, a still image, an audio signal, etc.) is disclosed that does not require the transmission of changes in the quantization step size and more evenly affects the fidelity of the source than techniques in the prior art that change the quantization step size at various points in the compression process. An illustrative embodiment of the present invention involves transforming a source (e.g., a video frame, audio sample, etc.) into m coefficients, in well-known fashion, wherein each of the m coefficients is represented by a known number of bits. Then, only n of the m coefficients are used for transmission or storage, as appropriate, where the n coefficients are more perceptually significant than the m-n coefficients not used.

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