System and method for performing optimized quantization via...

Details System and method for performing optimized quantization via... System and method for performing optimized quantization via...

2004-12-15

2011-10-04

Vo, Tung (Department: 2483)

Pulse or digital communications

Bandwidth reduction or expansion

Television or motion video signal

C375S240020

Reexamination Certificate

active

08031768

ABSTRACT:
A method, system, and program product for quantizing discrete cosine transform coefficients, e.g., for MPEG compression, with minimal bit rate overhead and without using a quantization matrix. This is done by scaling a uniform quantization parameter for the entire discrete cosine transform block, defining a variety of thresholds for the quantization of discrete cosine transform coefficients below which the corresponding coefficient will be quantized to zero, and setting different normative reconstructed values for coefficients that have not been quantized to zero as the decoder will still use the original, unmodified reconstructed values as long as the corresponding coefficient is not zero.

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patent: 7194030 (2007-03-01), Xiong et al.
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