Concepts for image / video data streams that allow efficient reduction or efficient random access

摘要

The video data stream is processed in such a way that the reduced video data stream image restriction is limited to a predetermined sub-region of the original video data stream image, and requantization is avoided. Is represented in a manner that can be reduced in such a way that the suitability of the reduced video data stream to the underlying codec is maintained. This causes the video data stream to produce a second set of predetermined sub-regions and permutation indexes to redirect to refer to an index contained in the payload portion, and / or a second set of encoding parameter settings. This is accomplished by providing information including replacement parameters for adjusting a set of ones. The transmission of image content is rendered more efficiently in that the image content does not need to be shaped or ordered in a predetermined manner. A similar procedure can be applied to the auxiliary extension information. Adjustment of already reduced data stream parameters and / or auxiliary extension information is also described. According to a further aspect, the adverse effects of bit rate peaks in a video data stream caused by random access points are reduced by providing two sets of random access points for the video data stream: one or more first random accesses Encode the first set of one or more images into a video data stream, interrupting temporal prediction in at least the first image sub-region, so as to form a set of sets of points; Suspending temporal prediction in a second image sub-region different from the first image sub-region to form the second set of random access points above, the second of one or more images Encode the set into a video data stream.