Method for Decoding and Encoding a Video Signal

• US 20090129468A1
• Filed: 10/09/2006
• Published: 05/21/2009
• Est. Priority Date: 10/05/2005
• Status: Abandoned Application

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Jeon, Byeong Moon, Park, Ji Ho, Kim, Dong Seok, Park, Seung Wook
• Application Number:
  US11/992,942
• Publication Number:
  US 20090129468A1
• Time in Patent Office: Days
• US Class Current: 375/240.130
• CPC Class Codes: H04N 19/103 Selection of coding mode or of prediction mode
• 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 19/159 Prediction type, e.g. intra-frame, inter-frame or bidirectional frame prediction
• CPC Class Codes: H04N 19/176 the region being a block, e.g. a macroblock
• CPC Class Codes: H04N 19/187 the unit being a scalable video layer
• CPC Class Codes: H04N 19/33 in the spatial domain
• CPC Class Codes: H04N 19/61 in combination with predictive coding
• CPC Class Codes: H04N 19/82 involving filtering within a prediction loop

Abstract

A method for decoding/encoding a video signal using an inter layer prediction process is disclosed. The method for decoding a video signal including several layer information includes: a) acquiring a first prediction signal for a current block of an enhancement layer and a residual signal based on at least a base layer block; b) smoothing the sum of the first prediction signal and the residual signal, and generating a second prediction signal for the current block; and c) reconstructing the current block based on the second prediction signal. Therefore, the method for decoding/encoding a video signal uses a variety of inter layer prediction methods according to the macroblock type of macroblocks of the current and base layers, and removes inter layer redundancy, resulting in increased coding efficiency.

Claims

1. A method for decoding a video signal including several layer information comprising:

a) acquiring a first prediction signal for a current block of an enhancement layer and a residual signal based on at least a base layer block;

b) smoothing the sum of the first prediction signal and the residual signal, and generating a second prediction signal for the current block; and

c) reconstructing the current block based on the second prediction signal.

2. The method according to claim 1, wherein the reconstructing step c) of the current block includes:

adding the second prediction signal for the current block and a residual signal; and

reconstructing the current block.

3. The method according to claim 1, wherein the generating step a) of the first prediction signal includes:

generating the first prediction signal on the basis of at least one prediction mode information from among the current block and a block of the base layer.

4. The method according to claim 3, wherein the prediction mode information of the current block is indicative of an intra prediction mode.

5. The method according to claim 4, wherein the prediction mode information of the base layer block is indicative of an inter prediction mode.

6. The method according to claim 3, wherein the prediction mode information of the base layer block is indicative of an inter prediction mode.

7. The method according to claim 2, wherein the residual signal is based on the enhancement layer.

8. The method according to claim 1, wherein the residual signal includes an umsmapled video signal based on the base layer block.

9. The method according to claim 8, wherein the upsampling increases resolution of the base layer according to resolution of the enhancement layer.