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Layer based hrd buffer management for scalable hevc

Inactive Publication Date: 2015-01-15
SONY CORP
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  • Description
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  • Application Information

AI Technical Summary

Benefits of technology

The patent describes methods for managing buffer management in HEVC video streams. This simplifies the process of managing video streams in existing networks and makes it easier to implement HEVC in these networks. The methods also allow for independent management of the buffers for the base and enhancement layers, reducing complexity. The video stream is re-assembled before decoding, and the methods allow for a multilayer decoder. The methods also utilize supplemental enhancement information to synchronize removal times and improve video quality. Overall, the patent simplifies the process of managing video streams in existing networks and improves the quality and synchronization of video streams.

Problems solved by technology

The buffer management in Advanced Video Coding (AVC)-based scalability (Scalable Video Coding (SVC) and Multiview Video Coding (MVC)) required an extension to system STD buffer model and introduced an additional layer of complexity to re-purposing and re-distribution equipment.

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  • Layer based hrd buffer management for scalable hevc
  • Layer based hrd buffer management for scalable hevc
  • Layer based hrd buffer management for scalable hevc

Examples

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Embodiment Construction

[0019]Described herein are options to reduce the buffer model complexity in High Efficiency Video Coding (HEVC)-based scalability.

[0020]The scalability model as introduced in SVC (and also used in MVC) uses AVC base layer and adds scalable enhancements to achieve temporal, Signal-to-Noise Ratio (SNR) and spatial improvements. Typical SVC applications targeted use cases where bit rate savings were achieved over simulcast of ‘base layer and enhancement without scalability.’ MVC provided view enhancements using a similar model.

[0021]Some of the application use cases required transmission of AVC base layer stream to base layer decoder while the enhancement layer was transmitted separately where the SVC / MVC decoder assembled the base and enhancement layers before decoding the enhanced data.

[0022]FIG. 1 illustrates a diagram of AVC and SVC decoding according to some embodiments. The base layer video stream used a different profile and level than the [base+enhancement layer] (usually the e...

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Abstract

The buffer management methods simplify the complexity of STD buffer management for HEVC and make is easy to implement HEVC in deployed AVC / MPEG-2 networks (as legacy re-multiplexers are able to be used for re-purposing HEVC content). The buffers for base and enhancement layers are also also be managed independently before re-assembly and this simplifies the STD model. Re-assembly is still implemented before decoding an enhanced HEVC video stream.

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 / 846,552, filed Jul. 15, 2013 and titled, “LAYER BASED HRD BUFFER MANAGEMENT FOR SCALABLE HEVC” and U.S. Provisional Patent Application Ser. No. 61 / 889,980, filed Oct. 11, 2013 and titled, “MULTILAYER HRD MANAGEMENT,” which are both hereby incorporated by reference in their entireties for all purposes.FIELD OF THE INVENTION[0002]The present invention relates to the field of imaging. More specifically, the present invention relates to video coding.BACKGROUND OF THE INVENTION[0003]The buffer management in Advanced Video Coding (AVC)-based scalability (Scalable Video Coding (SVC) and Multiview Video Coding (MVC)) required an extension to system STD buffer model and introduced an additional layer of complexity to re-purposing and re-distribution equipment. The extensions required management of both the base layer buffer and buffer ...

Claims

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Application Information

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IPC IPC(8): H04N19/46H04N19/423
CPCH04N19/00484H04N19/00545H04N19/30H04N19/423H04N19/44H04N19/70
Inventor TABATABAI, ALISATO, KAZUSHIHATTORI, SHINOBUSUZUKI, TERUHIKO
Owner SONY CORP
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