Method for scalably encoding and decoding video signal

• US 7,627,034 B2
• Filed: 04/03/2009
• Issued: 12/01/2009
• Est. Priority Date: 04/01/2005
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Jeon, Byeong Moon, Yoon, Doe Hyun, Park, Ji Ho, Park, Hyun Wook, Park, Seung Wook
• Primary Examiner(s): DIEP, NHON THANH
• Application Number:
  US12/418,129
• Publication Number:
  US 20090185627A1
• Time in Patent Office: 242 Days
• Field of Search: None
• US Class Current: 375/240.08
• CPC Class Codes: H04N 19/105 Selection of the reference unit for prediction within a chosen coding or prediction mode, e.g. adaptive choice of position and number of pixels used for prediction
• CPC Class Codes: H04N 19/13 Adaptive entropy coding, e.g. adaptive variable length coding [AVLC] or context adaptive binary arithmetic coding [CABAC]
• CPC Class Codes: H04N 19/187 the unit being a scalable video layer
• CPC Class Codes: H04N 19/31 in the temporal domain
• CPC Class Codes: H04N 19/33 in the spatial domain
• CPC Class Codes: H04N 19/46 Embedding additional information in the video signal during the compression process H04N19/517, H04N19/68, H04N19/70 take precedence
• CPC Class Codes: H04N 19/59 involving spatial sub-sampling or interpolation, e.g. alteration of picture size or resolution
• CPC Class Codes: H04N 19/61 in combination with predictive coding
• CPC Class Codes: H04N 19/615 using motion compensated temporal filtering [MCTF]
• CPC Class Codes: H04N 19/63 using sub-band based transform, e.g. wavelets

Abstract

In one embodiment, decoding of a video signal includes predicting at least a portion of a current image in a current layer based on at least a portion of a base image in a base layer and shift information for samples in the predicted current image.

Claims

1. A method for decoding a video signal in a video decoder apparatus, comprising:

obtaining, with the decoder apparatus, first phase shift information between a luma sample and a chroma sample in an enhanced layer;

determining, with the decoder apparatus, whether second phase shift information between a luma sample and a chroma sample in a base layer exists;

obtaining, with the decoder apparatus, second phase shift information from at least one of a sequence header and a slice header, based on the determining;

obtaining, with the decoder apparatus, a reference pixel value based on the first phase shift information and the second phase shift information, the reference pixel value being upsampled from residual-coded data in the base layer; and

decoding, with the decoder apparatus, a current block in the enhanced layer based on the reference pixel value.

2. The method of claim 1, wherein a spatial resolution of the enhanced layer is higher than a spatial resolution of the base layer, the enhanced layer and the base layer being from a same video signal.