Method for scalably encoding and decoding video signal
OwnerSeung Wook Park, Ji Park +1inventors
InventorsSeung Wook Park, Ji Park, Byeong Jeon
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Abstract
A method for scalably encoding and decoding a video signal is provided. If a frame temporally coincident with a current frame in an enhanced layer including a target macroblock is not present (i.e., if there is a missing base layer frame) in a base layer when the target macroblock is predicted during encoding of the enhanced layer, the target macroblock is encoded in an intra mode using a past and/or future frame of the base layer prior to and subsequent to the current frame. Thus, inter-layer prediction can be applied even to a missing picture when a video signal is scalably encoded, thereby increasing coding efficiency.
Claims16
A method for encoding a video signal, comprising:
- scalably encoding the video signal according to a first scheme to output a bitstream of a first layer;
- and
- encoding the video signal according to a second scheme to output a bitstream of a second layer,
- wherein encoding the video signal according to the first scheme includes encoding an image block present in an arbitrary frame in an intra mode, based on a past frame and/or a future frame of the second layer prior to and/or subsequent to the arbitrary frame.
A method for decoding an encoded video bitstream including a bitstream of a first layer encoded according to a first scheme and a bitstream of a second layer encoded according to a second scheme, the method comprising:
- decoding the bitstream of the second layer according to the second scheme;
- and
- scalably decoding the bitstream of the first layer according to the first scheme using information decoded from the bitstream of the second layer,
- wherein decoding the bitstream of the first layer includes reconstructing an image block in an arbitrary frame of the first layer based on a past frame and/or a future frame of the second layer prior to and/or subsequent to the arbitrary frame if the image block has been encoded in an intra mode based on data of the second layer.
Dependencies are inferred from the claim text.