US 2006/0133485 A1 · Method for encoding and decoding video signal

Abstract

Disclosed is a method for encoding a decoding a video signal. In the procedure of encoding the video signal, when a frame temporarily simultaneous with a frame including a macro block of an enhanced layer which will obtain a prediction video does not exist in a base layer, the macro block is encoded based on difference values of residual data using corresponding residual blocks in a past frame and a future frame of the base layer which are residual data corresponding to image difference values and using a residual block for the macro block of the enhanced layer. In another embodiment, the macro block is encoded based on difference values of residual data using corresponding residual blocks in a past frame and a future frame of the enhanced layer and the residual block for the macro block. Accordingly, a residual prediction mode is applied for a macro block of an enhanced layer even if a frame temporally simultaneous with a frame of the enhanced layer does not exist in a base layer, thereby improve coding efficiency.

Claims21

Dependent claims

A method for encoding a video signal, the method comprising the steps of:

generating a bit stream of a first layer by encoding the video signal through a first predetermined scalable scheme;
and
generating a bit stream of a second layer by encoding the video signal through a second predetermined scheme,
wherein the step of generating the bit stream of the first layer includes a first step of generating a prediction video of a video block using frames selected from frames of the second layer, in which the frames consist of blocks encoded in such a manner that the blocks have residual data corresponding to difference values of pixels between the reference block and the encoded blocks and include a past frame and a future frame with respect to a predetermined frame of the first layer having the video block encoded using residual blocks having the residual data.

1 more element

A method for decoding an encoded video bit stream, the method comprising the steps of:

decoding a bit stream of a second layer scalably encoded through a second predetermined scheme;
and
decoding a bit stream of a first layer encoded through the second predetermined scheme using decoding information extracted from the bit stream of the second layer,
wherein the step of decoding the bit stream of the first layer includes a first step of restoring a video block, which is included in a predetermined frame of the first layer and encoded using difference values of residual data, such that the video block has original pixel values by using frames, which are a past frame and a future frame with respect to the predetermined frame of the first layer, selected from frames of the second layer and consisting of blocks encoded to have residual data, or by using frames, which are a past frame and a future frame with respect to the predetermined frame of the first layer, selected from frames of the first layer and consisting of blocks encoded to have residual data.

1 more element

Dependencies are inferred from the claim text.

Method for encoding and decoding video signal

Life of this patent

Method for encoding and decoding video signal

Life of this patent

Abstract

Claims21