Patent ID: 7386180
Filing Date: 2008-06-10
Classification: H04N

Abstract:
1. An image signal reproduction apparatus including: a video decoding unit for decoding a coded video stream: an output buffer for storing data decoded by the video decoding unit; a video output unit for converting the decoded data that is stored in the output buffer into a final video output signal; a decoding count unit for counting the number of skip decoding fields, the decoding in the video decoding unit of said fields being skipped; a multistage decoding control unit for controlling the decoding or skipping thereof in the video decoding unit; a video display control unit for controlling the control for the video decoding unit by the multistage decoding control unit and the conversion of the decoded data into the final video output signal by the video output unit; and a sync signal generation unit for supplying a video sync signal to the video output unit and the video display control unit, wherein said decoding count unit sets the number of skip decoding fields on the basis of a multiple reproduction speed for the coded video stream and the number of fields included in one frame image to be decoded, and counts down the set number of skip decoding fields each time a new frame Is inputted. said video decoding unit skips decoding of the coded stream of a pictures that is not referred to, after the coded video stream corresponding to one frame has been decoded until the decoding count unit counts down the set number of skip decoding fields up to zero, and when decoded data corresponding to said one frame is not referred to at prediction, said video output unit outputs the decoded data corresponding to said one frame in synchronization with the video sync signal, while when the decoded data corresponding to said one frame is referred to at prediction, said video output unit outputs decoded data that has been decoded immediately before said decoded data corresponding to said one frame and is referred to at prediction, in synchronization with the video sync signal.