IP Library › Granted Patent US 12,684,125
Granted Patent B2
US 12,684,125 · App. 18/943,180 · Granted Jul 14, 2026

Binarization of dQP using separate absolute value and sign (SAVS) in CABAC

Inventor: Jun Xu (San Jose, CA)
Assignee: SONY GROUP CORPORATION
H04N19/124H03M7/3071H03M7/4018H03M7/6088H04N19/176H04N19/184H04N19/50H04N19/61H04N19/70H04N19/91
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Quick Facts
Patent No.
US 12,684,125
App. No.
18/943,180
Filed
Nov 11, 2024
Granted
Jul 14, 2026
Kind
B2
Art Unit
2485
USPC
341/107
Abstract

Video coding systems or apparatus utilizing context-based adaptive binary arithmetic coding (CABAC) during encoding and/or decoding, are configured according to the invention with an enhanced binarization of non-zero Delta-QP (dQP). During binarization the value of dQP and the sign are separately encoded using unary coding and then combined into a binary string which also contains the dQP non-zero flag. This invention capitalizes on the statistical symmetry of positive and negative values of dQP and results in saving bits and thus a higher coding efficiency.

Claims (24)

1 . A video processing apparatus, comprising:

circuitry configured to transfer a bit stream, wherein the bit stream comprises:

an encoded video, wherein

the encoded video is encoded based on Context-Based Adaptive Binary Arithmetic Coding;

an absolute value of a differential quantization parameter, wherein

the differential quantization parameter is a difference between a quantization parameter of a current coding unit and a predicted quantization parameter of the current coding unit; and

a sign value of the differential quantization parameter, wherein

the absolute value and the sign value are separately encoded in an order from the absolute value to the sign value in the bit stream.

2 . A video processing method, comprising:

transferring a bit stream, wherein the bit stream comprises:

an encoded video, wherein

the encoded video is encoded based on Context-Based Adaptive Binary Arithmetic Coding;

an absolute value of a differential quantization parameter, wherein

the differential quantization parameter is a difference between a quantization parameter of a current coding unit and a predicted quantization parameter of the current coding unit; and

a sign value of the differential quantization parameter, wherein

the absolute value and the sign value are separately encoded in an order from the absolute value to the sign value in the bit stream.

3 . A non-transitory computer-readable medium having stored thereon, computer-executable instructions which, when executed by a computer, cause the computer to execute operations, the operations comprising:

transferring a bit stream, wherein the bit stream comprises:

an encoded video, wherein

the encoded video is encoded based on Context-Based Adaptive Binary Arithmetic Coding;

an absolute value of a differential quantization parameter, wherein

the differential quantization parameter is a difference between a quantization parameter of a current coding unit and a predicted quantization parameter of the current coding unit; and

a sign value of the differential quantization parameter, wherein

the absolute value and the sign value are separately encoded in an order from the absolute value to the sign value in the bit stream.

Continuity (9)
Continuation 18138863 · Apr 25, 2023
Continuation 17567335 · Jan 3, 2022
Continuation 16985881 · Aug 5, 2020
Continuation 15909030 · Mar 1, 2018
Continuation 14795102 · Jul 9, 2015
Continuation 13345320 · Jan 6, 2012
Provisional Application 61503430 · Jun 30, 2011
Provisional Application 61497281 · Jun 15, 2011
Related Publication 20250071278A1 · Feb 27, 2025
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