Method and apparatus for multi-threaded video decoding
View Patent ↗A method and an apparatus for performing multi-threaded video decoding are disclosed. The method takes use of a multi-threaded scheme to process an encoded picture stream on a picture by picture basis. In the method, multiple threads are used for performing video decoding at the same time, such as one thread for the operation of parsing input bits into syntax elements of one picture implemented by the first thread, another thread for the operation of decoding the parsed syntax elements of another picture into pixel values implemented by the second thread, and the other threads for the operations of the non-reference picture, such as bidirectional predictive picture, including parsing input bits into syntax elements and the subsequent operation of decoding the parsed syntax elements into pixel values. Therefore, the decoding speed is substantially increased, and the decoding efficiency is enhanced.
1. A method for performing multi-threaded video decoding, comprising:
parsing input bits of a first picture of encoded picture streams into a plurality of syntax elements of the first picture;
decoding the plurality of syntax elements of the first picture into pixel values and parsing input bits of a second picture of encoded picture streams into a plurality of syntax elements of the second picture in a parallel manner;
determining whether the second picture has dependency on one or more other pictures while the step of parsing input bits of the second picture of encoded picture streams into a plurality of syntax elements of the second picture has been completed; and
if the second picture has no dependency on one or more other pictures, decoding the plurality of syntax elements of the second picture into pixel values.
2. The method for performing multi-threaded video decoding according to claim 1 , wherein the decoding of the second picture further comprises:
if the second picture has dependency on one or more other pictures, decoding the plurality of syntax elements of the second picture into pixel values while the one or more other pictures referred by the decoding operation of the second picture have been decoded.
3. The method for performing multi-threaded video decoding according to claim 2 , wherein the first picture comprises one of an intra-coded picture (I picture) and a predictive picture (P picture).
4. The method for performing multi-threaded video decoding according to claim 1 , wherein the second picture comprises one of a predictive picture (P picture) and one or more bi-directional predictive picture (B picture).
5. The method for performing multi-threaded video decoding according to claim 1 , further comprises determining whether the picture to be decoded includes a plurality of slices, and the multi-slice picture is decoded by multiple threads if the picture to be decoded includes a plurality of slices.