Method and an apparatus for processing a video signal
地域：
Seoul
摘要
The present invention relates to a video signal decoding method for adding an intra prediction mode as a sub-macroblock type to prediction of a macroblock in coding a video signal. Some implementations may include obtaining a macroblock type, when a macroblock includes the intra prediction coded sub-macroblock and the inter prediction coded sub-macroblock based on the macroblock type, obtaining prediction mode flag information indicating whether the sub-macroblock is the intra prediction coded or the inter prediction coded, and obtaining a prediction value of the sub-macroblock. Accordingly, implementations disclosed herein may raise coding efficiency of video signal by adding an intra prediction mode as a sub-macroblock type in predicting a macroblock.
說明書
This application is a continuation of U.S. patent application Ser. No. 16/259,938, filed on Jan. 28, 2019, which is a continuation of Ser. No. 16/020,840, filed on Jun. 27, 2018, now U.S. Pat. No. 10,230,974, which is a continuation of U.S. patent application Ser. No. 15/660,760, filed on Jul. 26, 2017, now U.S. Pat. No. 10,038,912, which is a continuation of U.S. patent application Ser. No. 14/807,968, filed on Jul. 24, 2015, now U.S. Pat. No. 9,749,652, which is a continuation of U.S. patent application Ser. No. 14/042,912, filed on Oct. 1, 2013, now U.S. Pat. No. 9,167,249, which is a continuation of U.S. patent application Ser. No. 12/574,313, filed on Oct. 6, 2009, now U.S. Pat. No. 8,879,637; which claims the benefit of U.S. Provisional Application No. 61/223,073, filed on Jul. 6, 2009; U.S. Provisional Application No. 61/177,638, filed on May 12, 2009, U.S. Provisional Application No. 61/156,536, filed on Mar. 1, 2009; U.S. Provisional Application No. 61/143,821, filed on Jan. 12, 2009; U.S. Provisional Application No. 61/143,826, filed on Jan. 12, 2009; U.S. Provisional Application No. 61/117,958, filed on Nov. 26, 2008; U.S. Provisional Application No. 61/103,219, filed on Oct. 6, 2008 and Korean Patent Application No. 10-2009-0094490, filed on Oct. 6, 2009 all of which are incorporated by reference in their entirety herein.
The present invention relates to coding of a video signal.
權(quán)利要求
The invention claimed is:1. A method for decoding a bitstream by a video decoding apparatus, the method comprising:obtaining, by the video decoding apparatus from the bitstream, first information for a current block, the first information specifying whether the bitstream contains transform coefficient information for the current block; determining, based on the first information, whether to obtain second information for a sub-block of the current block, the second information of the sub-block specifying whether the bitstream contains transform coefficient information for the sub-block; obtaining, by the video decoding apparatus from the bitstream, the second information for the sub-block of the current block based on the first information having a first value; obtaining, by the video decoding apparatus from the bitstream, the transform coefficient information for the sub-block based on the second information of the sub-block having the first value; obtaining, by the video decoding apparatus, residual data of the sub-block based on the obtained transform coefficient information; and reconstructing, by the video decoding apparatus, the sub-block based on the obtained residual data, wherein, based on the first information having a second value, the obtaining the second information for the sub-block of the current block is skipped. 2. The method according to claim 1 , wherein the first value is 1. 3. The method according to claim 1 , wherein the bitstream contains no transform coefficient information for the current block based on the first information having the second value. 4. The method according to claim 1 , wherein the bitstream contains no transform coefficient information for the sub-block based on the second information of the sub-block having the second value. 5. The method according to claim 3 , wherein the second value is 0. 6. The method according to claim 1 , wherein the current block is partitioned into a plurality of sub-blocks based on a transform block unit for performing an inverse-transform operation. 7. The method according to claim 1 , wherein the current block has a size equal to or greater than 32×32. 8. A video decoding apparatus configured to decode a bitstream, the video decoding apparatus comprising:an entropy decoding unit configured to:obtain, from the bitstream, first information for a current block, the first information specifying whether the bitstream contains transform coefficient information for the current block, determine, based on the first information, whether to obtain second information for a sub-block of the current block, the second information of the sub-block specifying whether the bitstream contains transform coefficient information for the sub-block, obtain, from the bitstream, the second information for the sub-block of the current block based on the first information having a first value, and obtain, from the bitstream, the transform coefficient information for the sub-block based on the second information of the sub-block having the first value; and an inverse-transform unit configured to:obtain residual data of the sub-block based on the obtained transform coefficient information, and reconstruct the sub-block based on the obtained residual data, wherein, based on the first information having a second value, obtaining the second information for the sub-block of the current block is skipped. 9. The video decoding apparatus according to claim 8 , wherein the first value is 1. 10. The video decoding apparatus according to claim 8 , wherein the bitstream contains no transform coefficient information for the current block based on the first information having the second value. 11. The video decoding apparatus according to claim 8 , wherein the bitstream contains no transform coefficient information for the sub-block based on the second information of the sub-block having the second value. 12. The video decoding apparatus according to claim 6 , wherein the second value is 0. 13. The video decoding apparatus according to claim 10 , wherein the current block is partitioned into a plurality of sub-blocks based on a transform block unit for performing an inverse-transform operation. 14. The video decoding apparatus according to claim 8 , wherein the current block has a size equal to or greater than 32×32. 15. A method for encoding a bitstream by a video encoding apparatus, the method comprising:encoding, by the video encoding apparatus into the bitstream, first information for a current block, the first information specifying whether the bitstream contains transform coefficient information for the current block; determining, based on the first information, whether to encode second information for a sub-block of the current block, the second information of the sub-block specifying whether the bitstream contains transform coefficient information for the sub-block; encoding, by the video encoding apparatus into the bitstream, the second information for the sub-block of the current block based on the first information having a first value; encoding, by the video encoding apparatus into the bitstream, the transform coefficient information for the sub-block based on the second information of the sub-block having the first value; obtaining, by the video encoding apparatus, residual data of the sub-block based on the encoded transform coefficient information; and reconstructing, by the video encoding apparatus, the sub-block based on the obtained residual data, wherein, based on the first information having a second value, the second information for the sub-block of the current block is not encoded. 16. A non-transitory computer readable storage medium storing the bitstream encoded by the method of claim 15 . 17. A video encoding apparatus configured to encode a bitstream, the video encoding apparatus comprising:an entropy coding unit configured to:encode, into the bitstream, first information for a current block, the first information specifying whether the bitstream contains transform coefficient information for the current block, determine, based on the first information, whether to encode second information for a sub-block of the current block, the second information of the sub-block specifying whether the bitstream contains transform coefficient information for the sub-block, encode, into the bitstream, the second information for the sub-block of the current block based on the first information having a first value, and encode, into the bitstream, the transform coefficient information for the sub-block based on the second information of the sub-block having the first value; and an inverse-transform unit configured to:obtain residual data of the sub-block based on the encoded transform coefficient information, and reconstruct the sub-block based on the obtained residual data, wherein, based on the first information having a second value, the second information for the sub-block of the current block is not encoded.
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