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Method for decoding video signal encoded using inter-layer prediction

An inter-layer prediction and residual prediction technology, which is applied in the fields of digital video signal modification, television, and image communication, and can solve problems such as indistinguishability, decoding errors, and image quality degradation.

Active Publication Date: 2010-07-07
LG ELECTRONICS INC
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  • Summary
  • Abstract
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  • Application Information

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Problems solved by technology

[0004] Although low image quality video can be rendered by receiving and processing a portion of an image sequence coded according to an adjustable MCTF scheme, the problem remains that the image quality is significantly reduced if the bit rate is reduced
However, current decoding methods cannot distinguish between blocks coded by prediction of temporally overlapping frames and blocks coded by prediction of temporally adjacent frames, thus causing decoding errors

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  • Method for decoding video signal encoded using inter-layer prediction
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  • Method for decoding video signal encoded using inter-layer prediction

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Embodiment Construction

[0024] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0025] figure 2 is a block diagram of an apparatus for decoding an encoded data stream. figure 2 The decoding device includes a demultiplexer (or demultiplexer) 200 , a texture decoding unit 210 , a motion decoding unit 220 , an MCTF decoder 230 and a base layer (BL) decoder 240 . The demultiplexer 200 separates the received data stream into a compressed motion vector stream, a compressed macroblock information stream and a base layer stream. The texture decoding unit 210 reconstructs the compressed macroblock information stream to its original uncompressed state. Motion decoding unit 220 reconstructs the compressed motion vector stream to its original uncompressed state. MTCF decoder 230 is an enhancement layer (EL) decoder that converts the uncompressed macroblock information stream and the uncompressed motion vector stream back to the ori...

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Abstract

The invention relates to a method for decoding video signal encoded using inter-layer prediction. A method for receiving and decoding an encoded bitstream of a first layer and an encoded bitstream of a second layer into a video signal is provided. It is determined whether or not a block temporally coincident with a target block in a picture of the first layer is present in the bitstream of the second layer. An operation for checking information (intra_base_flag and residual_prediction_flag) indicating whether or not the target block has been predicted based on data of a block in a different layer corresponding to the target block is skipped if no block temporally coincident with the target block is present in the bitstream of the second layer. This method eliminates the need for encoders to transmit unnecessary information (intra_base_flag and residual_prediction_flag) when performing inter-layer prediction using a temporally adjacent frame.

Description

[0001] This application is a divisional application of an application whose application date is November 2, 2007 and whose application number is No. 200680015045.X. technical field [0002] The invention relates to a method of decoding a video signal encoded using inter-layer prediction. Background technique [0003] Scalable Video Codec (SVC) encodes video into an image sequence with the highest image quality while ensuring that a portion of the encoded image sequence (especially a portion of the frame sequence intermittently selected from the entire frame sequence) can be decoded And render video with low image quality. Motion Compensated Temporal Filtering (MCTF) is a coding scheme proposed for use in scalable video codecs. [0004] Although low image quality video can be rendered by receiving and processing a portion of an image sequence encoded according to an adjustable MCTF scheme, there is still a problem that image quality is significantly reduced if the bit rate i...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26H04N7/32H04N19/30H04N19/51
CPCH04N7/26351H04N19/00787H04N19/00533H04N19/00884H04N7/26313H04N7/26335H04N7/26297H04N19/00024H04N19/00321H04N7/26015H04N19/00545H04N19/105H04N19/187H04N19/44H04N19/46H04N19/615H04N19/70H04N19/31H04N19/30H04N19/51
Inventor 全柄文朴胜煜朴志皓
Owner LG ELECTRONICS INC