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Simplified processing of weighted prediction syntax and semantics using a bit depth variable for high precision data

A technique of weighted prediction and bit depth, used in digital video signal modification, image communication, electrical components, etc.

Active Publication Date: 2016-07-13
ARRIS INT IP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under some conditions, such as when fading occurs, pixels in one of the reference units in bidirectional prediction may not yield the most accurate prediction

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  • Simplified processing of weighted prediction syntax and semantics using a bit depth variable for high precision data
  • Simplified processing of weighted prediction syntax and semantics using a bit depth variable for high precision data
  • Simplified processing of weighted prediction syntax and semantics using a bit depth variable for high precision data

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Embodiment Construction

[0013] Described herein are techniques for performing weighted forecasting. In the following description, for purposes of explanation, numerous examples and specific details are set forth in order to provide a thorough understanding of certain embodiments. Particular embodiments as defined by the claims may include some or all of the features of these examples alone or in combination with other features described below, and may further include modifications and equivalents of the features and concepts described herein.

[0014] Certain embodiments provide a variable BitDepth that can be set to a value based on the number of bits used to represent pixels in a picture of a video. This variable may be used in syntax elements in HEVC such as HEVC Range Extensions, but other encoding standards may be used. By using this variable, different resolutions of the video can be accommodated during the encoding and decoding process. For example, depending on the resolution, the number of...

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Abstract

Particular embodiments may remove a condition check in the semantics for checking a high-precision data flag. This simplifies the semantics used in the encoding and decoding process. In this case, even if the high-precision data flag is not set, the value of the weighted prediction syntax element is set by the BitDepth variable. However, even if the BitDepth is not considered high-precision data, such as 8 bits, the range for the weighted prediction syntax element is still the same as the fixed value. For example, the syntax elements luma_offset_l0[ i ], luma_offset_l1[ i ], delta_chroma_offset_l0[i][j], and delta_chroma_offset_l1[i][j] use the variable BitDepth as described above whether the flag extended_precision_processing_flag is enabled and not enabled to indicate whether the bit depth is above a threshold.

Description

[0001] Related Application Cross Reference [0002] This disclosure claims priority to U.S. Provisional Application No. 61 / 900,337, entitled "Simplification of Weighted Prediction Syntax and Semantics for HEVC Range Extension," filed November 5, 2013, the contents of which are incorporated by reference in their entirety. into this article. Background technique [0003] The High Efficiency Video Coding ("HEVC") coding standard (also known as H.265) is a coding standard promulgated by the ISO / IEC MPEG standardization organization. HEVC supports higher resolutions than "high definition," which means that pixels can be represented by a larger number of bits than high definition pictures. For example, 4K resolution may include an image that is 4000 pixels wide, compared to a high-definition image that is 1920 pixels wide. [0004] Temporal motion prediction is an effective method to improve coding efficiency and provide high compression. HEVC uses a translation model for tempor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/70H04N19/573H04N19/577
CPCH04N19/573H04N19/577H04N19/70H04N19/105H04N19/139H04N19/184
Inventor 余越王利民
Owner ARRIS INT IP LTD