Patent ID: 9578290
Date: 2017-02-21
CPC Classifications: H04N

Claim:
1. A video data reproduction system comprising: a source storing first and second video data derived from a same video data; an output node; a providing unit configured to provide sequentially the first and the second video data to said output node and coupled between said source and said output node; and a switching unit configured to switch data between the second and the first video data in response to a control signal, and coupled to said providing unit, wherein when a mode switching request has been received, the switching unit determines whether a latest picture provided from the second video data was an intra frame, wherein when the latest picture provided from the second video data was not an intra frame, the switching unit refrains from switching from the second video data to the first video data and sets a read-out address to a head address of the next picture in the second video data and then determines whether the next picture provided in the second video data is an intra frame, and when the latest picture provided from the second video data is an intra frame, the switching unit sets switching positions to an intra frame in the second video data and another intra frame in the first data which is identical to the intra frame in the second video data, wherein the first video data includes intra frames and non-intra frames, the intra frames being decoded independently and the non-intra frames being decoded by referencing preceding and/or subsequent frames and the second video data includes at least the intra frames in the first video data and a subset of the non-intra frames in the first video data, and the second video data is generated by removing frames from the first video data that are other than intra frames at a fixed frame skipping interval, so that the second video data comprises intra frames and a reduced number of non-intra frames.