Coding Unit Quantization Parameters in Video Coding
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a video coding and quantization parameter technology, applied in the field of coding unit quantization parameters in video coding, can solve the problems of loss of quality, reduced bit rate, and less detail retained,
Inactive Publication Date: 2011-11-10
TEXAS INSTR INC
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As the Qs increases, less detail is retained and the bit rate d...
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[0015]Specific embodiments of the invention will now be described in detail with reference to the accompanying figures. Like elements in the various figures are denoted by like reference numerals for consistency.
[0016]As was previously discussed, in current video coding standards such as H.264 / AVC, the coding operations of prediction, transformation, quantization, and entropy coding are performed based on fixed size 16×16 blocks referred to as macroblocks. Further, a quantization parameter is generated for each macroblock with no provision for doing so for larger or smaller blocks. For larger frame sizes, e.g., frame sizes used for high definition video, using a larger block size for the block-based coding operations may provide better coding efficiency and / or reduce data transmission overhead. For example, a video sequence with a 1280×720 frame size and a frame rate of 60 frames per second is 36 times larger and 4 times faster than a video sequence with a 176×144 frame size and...
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Abstract
A method is provided that includes receiving a coded largest coding unit in a video decoder, wherein the coded largest coding unit includes a coded coding unit structure and a plurality of coded quantization parameters, and decoding the coded largest coding unit based on the coded coding unit structure and the plurality of coded quantization parameters.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application claims benefit of U.S. Provisional Patent Application Ser. No. 61 / 331,216, filed May 4, 2010, of U.S. Provisional Patent Application Ser. No. 61 / 431,889, filed Jan. 12, 2011, and of U.S. Provisional Patent Application Ser. No. 61 / 469,518, filed Mar. 30, 2011, all of which are incorporated herein by reference in their entirety.BACKGROUND OF THE INVENTION[0002]The demand for digital video products continues to increase. Some examples of applications for digital video include video communication, security and surveillance, industrial automation, and entertainment (e.g., DV, HDTV, satellite TV, set-top boxes, Internet video streaming, video gaming devices, digital cameras, cellular telephones, video jukeboxes, high-end displays and personal video recorders). Further, video applications are becoming increasingly mobile as a result of higher computation power in handsets, advances in battery technology, and high-speed wireless ...
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