Methods for delta-QP signaling for decoder parallelization in hevc

a decoder and parallelization technology, applied in signal generators with optical-mechanical scanning, color televisions with bandwidth reduction, etc., can solve the problems of significant increase in the length of the decoding pipeline, inability to reconstruct cub>0/b>, and difficulty in hardware decoding standard dqp syntax

US20120183049A1Active Publication Date: 2012-07-19SONY GRP CORP
1 Cites 16 Cited by

Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
Publication Date
2012-07-19
Patent Text Reader

Abstract

By implementing a new bitstream for a Delta-Quantization Parameter (DQP), a decoder is able to implement parallel decoding of multiple coding units within a largest coding unit. In some embodiments, the DQP is placed immediately after the mode information of the first coding unit. In some embodiments, the DQP is placed after the mode information of the first non-skipped coding unit. In some embodiments, the DQP is placed after the first non-zero coded block flag.
Need to check novelty before this filing date? Find Prior Art

Description

CROSS-REFERENCE TO RELATED APPLICATION(S)

[0001] This application claims priority under 35 U.S.C. §119(e) of the U.S. Provisional Patent Application Ser. No. 61 / 433,039, filed Jan. 14, 2011 and titled, “CHANGING BITSTREAM SYNTAX FOR DELTA-QP SIGNALING FOR DECODER PARALLELIZATION IN HEVC.” The Provisional Patent Application, Ser. No. 61 / 433,039, filed Jan. 14, 2011 and titled, “CHANGING BITSTREAM SYNTAX FOR DELTA-QP SIGNALING FOR DECODER PARALLELIZATION IN HEVC” is also hereby incorporated by reference in its entirety for all purposes.FIELD OF THE INVENTION

[0002] The present invention relates to the field of image processing. More specifically, the present invention relates to methods for delta-qp signaling for decoder parallelization in High Efficiency Video Coding (HEVC).BACKGROUND OF THE INVENTION

[0003] In Advanced Video Coding (AVC), changing a quantization parameter (referred to as Delta Quantization Parameter (DQP)) is allowed at the macroblock level for better rate control and reg...

Examples

Embodiment Construction

[0024]To improve the Delta Quantization Parameter (DQP) syntax, several possibilities exist. Specifically, the location of the DQP signaling is placed in different locations in the Largest Coding Unit (LCU) bitstream. By moving the DQP signaling, the decoder pipelining issue is resolved.

[0025]FIG. 2 illustrates a diagram of a modified LCU syntax according to some embodiments. When the LCU is coded in the SKIP mode, then no DQP is sent. However, in the modified LCU syntax 200, the DQP 202 is positioned immediately after the mode information (M0) of the first CU if the LCU is not coded in the SKIP mode. With this change, decoder pipelining is enabled (e.g. after entropy decoding of CU0, CU0 is able to be reconstructed immediately, while the entropy decoder is able to simultaneously proceed to decode CU1).

[0026]FIG. 3 illustrates a diagram of a modified LCU syntax according to some embodiments. When all of the Coding Units (CUs) within the LCU are coded in the SKIP mode, there is no DQ...