JP2009290630A5 - - Google Patents

Claims (5)

A video encoding apparatus for encoding a video signal by using the intra coding, the prediction encoding between screens using a reference image,
Prediction processing means for selectively generating intra prediction related to the intra encoding and inter prediction corresponding to the predictive encoding between the screens to generate a prediction image ;
Encoding means for encoding a residual signal indicating a difference between an encoding target image related to the video signal and the prediction image generated by the prediction processing means ;
Scene change detection means for detecting a scene change of an image related to the video signal;
A reduced image generation means for generating a reduced image of the scene change detection means is predictive coding of a reference image among the first to the screen Dego biopsies by Resid Nchenji the image,
In response to a scene change is detected by the scene change detecting means, to and a multiplex processing means for outputting by multiplexing said reduced image coded video data outputted from said coding means A video encoding device. The intra-screen coding and the predictive coding between the screens are determined in units of each slice of a plurality of slices constituting the screen,
The video encoding apparatus according to claim 1, wherein the reduced image generation unit generates the reduced image in units of the slices.   3. The video encoding apparatus according to claim 1, wherein the multiplexing processing unit multiplexes the reduced image as SEI (Supplemental Enhancement Information) in the MPEG-4 AVC system. The reduced image generation means , when the intra prediction is performed by the prediction processing means, reduces the reduced image from a prediction image generated by executing an intra prediction mode that generates a prediction image from an average value of a plurality of pixels. video encoding apparatus according to any one of claims 1 to 3, characterized that you generate. A video decoding device that receives and decodes encoded video data encoded by the video encoding device according to any one of claims 1 to 4,
A video decoding apparatus characterized in that, when an error occurs during decoding of the encoded video data, an image in which the error has occurred is interpolated by the reduced image.