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Adaptive temporal filter for an unavailable reference picture cross-reference to related applications

A reference block and reference frame technology, applied in image communication, electrical components, digital video signal modification, etc., can solve the problems of complex calculation cost, inability to reflect frame background, and high cost

Pending Publication Date: 2021-07-23
オーピー ソリューションズ エルエルシー
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But updating the entire frame is expensive, especially if only a small portion of the static background has changed
Partial frame updates are possible, but usually involve complex and computationally expensive procedures to achieve frame updates
Furthermore, such updates can often involve copying part of the current frame to the frame when part of the background changes, which may require frequent updates and may not reflect future frame backgrounds, resulting in relatively poor bitrate performance

Method used

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  • Adaptive temporal filter for an unavailable reference picture cross-reference to related applications
  • Adaptive temporal filter for an unavailable reference picture cross-reference to related applications
  • Adaptive temporal filter for an unavailable reference picture cross-reference to related applications

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Embodiment Construction

[0022] Embodiments described in this disclosure relate to the reception, updating and manipulation of unavailable reference frames. An unavailable reference (unavailable reference, UR) frame is a frame and / or picture used to create a predicted frame and / or picture in one or more picture groups (group of picture, GOP), but the frame and / or picture itself does not appear in the video image. A frame in the video bitstream that is marked as a UR frame can be used as a reference until that frame is explicitly removed by bitstream signaling. UR frames can improve prediction and compression efficiency in scenes with static backgrounds over long periods of time (eg, the background of a video conference or parking lot surveillance video). However, the background of the scene gradually changes over time (for example, a car becomes part of the background scene when it is parked in an empty location). Thus, updating UR frames can improve compression performance by allowing better predic...

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Abstract

A decoder includes circuitry configured to receive a bitstream, decode a plurality of video frames from the bitstream, determine for a current block of a current frame that a long term reference block update mode is enabled, determine a long term reference block update including pixel values and using the plurality of video frames, and update a portion of a long term reference frame with the long term reference block update. Related apparatus, systems, techniques and articles are also described.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to U.S. Provisional Patent Application No. 62 / 771,918, filed November 27, 2018, entitled "ADAPTIVE TEMPORAL FILTER FORAN UNAVAILABLE REFERENCE PICTURE," the entire contents of which are incorporated herein by reference. technical field [0003] The present invention relates generally to the field of video compression. In particular, the invention relates to adaptive temporal filters for unavailable reference pictures. Background technique [0004] A video codec may include electronic circuitry or software that compresses or decompresses digital video. It can convert uncompressed video to compressed format and vice versa. In the context of video compression, a device that compresses video (and / or performs some of its functions) may generally be referred to as an encoder, while a device that decompresses video (and / or performs some of its functions) can be called a decoder. [0005] V...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/51H04N19/50H04N7/12
CPCH04N19/51H04N19/895H04N19/105H04N19/107H04N19/176H04N19/70H04N19/65H04N19/117H04N19/142H04N19/44
Inventor V·阿季奇H·卡瓦B·富尔赫特
Owner オーピー ソリューションズ エルエルシー