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US 8,411,744 B2Granted
Method and apparatus for decoding/encoding a video signal
AssigneeLG Electronics Inc.
InventorsByeong Moon Jeon, Seung Wook Park, Han Suh Koo, Yong Joon Jeon
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Abstract
The present invention provides a method of decoding a video signal. The method includes the steps of obtaining view information of a picture from the video signal and generating information for reference picture management using the view information.
Claims11
A method for decoding a multi-view video data in a multi-view video stream with a decoding apparatus, comprising:
- receiving, with the decoding apparatus, the multi-view video stream, the multi-view video stream including a random access picture, the random access picture being a coded picture in which all slices reference only slices having a same time as the random access picture;
- obtaining, with the decoding apparatus, a random access flag for inter-view prediction from the multi-view video stream, the random access flag indicating whether a type of picture is the random access picture;
- obtaining, with the decoding apparatus, initialization information of a reference picture list, the initialization information representing view dependency relationships between a plurality of views, the initialization information including view number information and view identification information;
- initializing, with the decoding apparatus, the reference picture list based on the random access flag, the initializing including ordering reference pictures for the random access picture in a decoded picture buffer, the ordering including assigning an inter-view reference index to each reference picture, the inter-view reference index identifying a reference picture in the reference picture list used for inter-view prediction of a block to be decoded in the random access picture, the assigning the inter-view reference index being performed using the view number information and the view identification information;
- obtaining, with the decoding apparatus, modification information for the initialized reference picture list from the multi-view video stream, the modification information representing how to change the inter-view reference index assigned to the reference picture in the initialized reference picture list;
- modifying, with the decoding apparatus, the initialized reference picture list for inter-view prediction, the modifying including reordering the reference picture by changing the inter-view reference index assigned to the reference picture based on the modification information;
- determining, with the decoding apparatus, a prediction value of a current macroblock based on the modified reference picture list;
- and
- decoding, with the decoding apparatus, the current macroblock using the prediction value,
- wherein the initialization information is obtained from an extension area of a sequence header in the multi-view video stream.
7 more elements
An apparatus for decoding a multi-view video data in a multi-view video stream, comprising:
- a parsing unit configured to receive the multi-view video stream, the multi-view video stream including a random access picture, the random access picture being a coded picture in which all slices reference only slices having a same time as the random access picture, the parsing unit configured to obtain a random access flag for inter-view prediction from the multi-view video stream, the random access flag indicating whether a type of picture is the random access picture, and the parsing unit configured to obtain initialization information of a reference picture list, the initialization information representing view dependency relationships between a plurality of views, the initialization information including view number information and view identification information;
- a decoded picture buffer unit configured to initialize the reference picture list based on the random access flag, the initializing including ordering reference pictures for the random access picture in a decoded picture buffer, the ordering including assigning an inter-view reference index to each reference picture, the inter-view reference index identifying a reference picture in the reference picture list used for inter-view prediction of a block to be decoded in the random access picture, the assigning the inter-view reference index being performed using the view number information and the view identification information, and obtain modification information for the initialized reference picture list from the multi-view video stream, the modification information representing how to change the inter-view reference index assigned to the reference picture in the initialized reference picture list, and configured to modify the initialized reference picture list for inter-view prediction, the modifying including reordering the reference picture by changing the inter-view reference index assigned to the reference picture based on the modification information;
- and
- an inter-prediction unit configured to determine a prediction value of a current macroblock based on the modified reference picture list, and configured to decode the current macroblock using the prediction value,
- wherein the initialization information is obtained from an extension area of a sequence header in the multi-view video stream.
2 more elements
Dependencies are inferred from the claim text.