METHOD OF BIT ALLOCATION FOR IMAGE & VIDEO COMPRESSION USING PERCEPTUAL GUIDANCE

摘要

A video processing system is provided to create quantization data parameters based on human eye attraction to provide to an encoder to enable the encoder to compress data taking into account the human perceptual guidance. The system includes a perceptual video processor (PVP) to generate a perceptual significance pixel map for data to be input to the encoder. Companding is provided to reduce the pixel values to values ranging from zero to one, and decimation is performed to match the pixel values to a spatial resolution of quantization parameter values (QP) values in a look up table (LUT). The LUT table values then provide the metadata to provide to the encoder to enable compression of the original picture to be performed by the encoder in a manner so that bits are allocated to pixels in a macroblock according to the predictions of eye tracking.

主权项

1. A system for allocating bits for video signal processing and compression, the system comprising:
an input module configured to receive an original picture in a video sequence; a control processor configured to:
receive an original picture from the input module;obtain a perceptual significance pixel map for the original picture using predictions of eye tracking;provide an absolute value for numbers in the significance pixel map;perform companding to reduce the determined absolute value of the pixel values to values ranging from zero to one;perform decimation on the companded values to match a spatial resolution of QP values to be encoded;determine quantization parameters for the pixels provided from the decimation from a quantization parameter (QP) look up table (LUT);provide the QP LUT table values as metadata to enable compression of the original picture in a manner so that bits are allocated to pixels in a macroblock according to the predictions of eye tracking; and an encoder having a first input receiving the original video from the input module, and a control input for receiving the quantization metadata and using the quantization metadata to encode the original video.