Picture data processor, picture data decoder and picture data encoder, and methods thereof
AssigneeSony Corporation
InventorMotoki Kato
Life of this patent
Estimating the term…
Abstract
A picture data processor, a picture data decoder and a picture data encoder, and methods thereof, are capable of surely decoding and reencoding inputted coded data without delaying. Coded data D1 in order of encoding which is generated by encoding original picture data in order of display, for each prescribed data unit by a prescribed coding type I, P or B and in order of prescribed encoding, is decoded in order of this encoding. The decoded picture data D110 is outputted in order of decoding to be reencoded in order of decoding. And the reencoded data is outputted in order of encoding. Thereby, the inputted coded data D1 can be surely decoded and reencoded without delaying.
Claims6
A picture data processor for decoding and re-encoding an encoded picture file comprising a plurality of I-type, P-type, and B-type frames sequenced in the order in which the frames were encoded and wherein the number of B-type frames between each I-type and P-type frame changes, comprising:
- decoding means for decoding said plurality of frames from said encoded picture file into a decoded output stream having the same frame order;
- first sequence rearranging means for resequencing the frame order of said decoded output stream into a display output stream for display;
- second sequence rearranging means for resequencing the frame order of a display input stream of a picture file having a frame order sequenced for display into a display input stream having a frame order sequenced for encoding;
- switching means for switching an input stream to a re-encoding means between said decoded output stream and said display input stream;
- and
- said re-encoding means for re-encoding said input stream from said switching means into a re-encoded picture file having frames sequenced in the order in which the frames were re-encoded.
A method of picture data processing for decoding and re-encoding an encoded picture file comprising a plurality of I-type, P-type, and B-type frames sequenced in the order in which the frames were encoded and wherein the number of B-type frames between each I-type and P-type frame changes, comprising the steps of:
- decoding said plurality of frames from said encoded picture file into a decoded output stream having the same frame order;
- resequencing the frame order of said decoded output stream into a display output stream for display;
- resequencing the frame order of a display input stream of a picture file having a frame order sequenced for display into a display input stream having a frame order sequenced for encoding;
- switching an input stream to be re-encoded between said decoded output stream and said display input stream using a switching means;
- and
- re-encoding said input stream from said switching means into a re-encoded picture file having frames sequenced in the order in which the frames were re-encoded.
Dependencies are inferred from the claim text.