Methods and systems for reference processing in image and video codecs

摘要

Multi-layer encoding and decoding systems and methods are provided. A processing module processes outputs of a first base or enhancement layer and sends the processed outputs to a second, enhancement layer. Operation of the processing module is controlled, so that the second layer can receive processed or unprocessed outputs of the first layer in accordance with the circumstances. Processing of the outputs of the first layer can occur together with or separately from a disparity compensation process.

主权项

1. A multi-layered video decoding system comprising:
one or more inputs for accessing one or more layers of a coded bitstream to be decoded; a first layer, comprising a first layer video decoder, the first layer video decoder comprising a first layer reference picture buffer; a second layer, associated with the first layer, the second layer comprising a second layer video decoder, the second layer video decoder comprising a second layer reference picture buffer; a reference processing selector connected to the first layer reference picture buffer and the second layer reference picture buffer, to select whether to process the output reference pictures of the first layer video decoder and input the processed output reference pictures of the first layer video decoder into the second layer video decoder or not, wherein the reference processing selector comprises a region analysis module to analyze regions of an image and select which regions of the image to process or not to process within the image and select separate processing in accordance with the analysis performed on the regions; a processing module, located downstream of the reference processing selector, to process, upon instruction of the reference processing selector, the output reference pictures of the first layer video decoder and input the processed output reference pictures into the second layer video decoder, the processing module comprising a reference processing filter and a disparity compensation filter; wherein the processing module performs disparity compensation with reference processing when the output reference pictures of the first layer video decoder is processed, and the processing module performs disparity compensation without reference processing when the output reference pictures of the first layer video decoder is not processed.