8x8 transform and quantization

A technology of inverse quantization and quantization step size, which is applied in the fields of instrumentation, computing, and electrical digital data processing, and can solve problems such as high computational complexity.
CN1856997AInactive Publication Date: 2006-11-01TEXAS INSTR INC
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TEXAS INSTR INC
Publication Date
2006-11-01
Estimated Expiration
Not applicable · inactive patent

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Abstract

Low complexity video compression has 8x8 block with transforms using 8x8 integer matrices and quantization with look up table scalar plus constant right shift for all quantization steps. Inverse quantization also a look up table scalar plus right shift dependent upon the quantization step and inverse transform using the 8x8 integer matrices.
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Description

[0001] Related Application Cross Reference

[0002] This application claims priority to Provisional Application Serial No. 60 / 505,575, filed September 24,2003. Related subject matter is disclosed in the following commonly assigned pending patent application: Provisional Application No. 60 / 524,831 filed November 25,2003. technical field

[0003] The present invention relates to digital image and video signal processing, and more particularly to block transform and / or quantization plus inverse quantization and / or inverse transform. Background technique

[0004] Various applications exist for digital video communication and storage, and corresponding international standards have been developed and continue to be developed. Low bit rate communications such as video telephony and conferencing coupled with the compression of large video files such as movies has led to various video compression standards: H.261, H.263, MPEG-1, MPEG-2, AVS, etc. These compression methods rely on t...

Claims

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