Systems and methods for transmitting video frames

摘要

Systems and methods for transmitting video frames are described. Specifically, frame rate modification techniques such as blending and/or packing processes are used to translate high frame-rate signals into low-frame rate signals, which are transmitted over limited bandwidth transmission media to a video signal receiver. Information pertaining to the blending and/or packing processes is transferred to the video signal receiver in the form of a map that is used to reconstruct the high frame-rate signals from the low-frame rate signals. The high frame-rate signals may be used by certain types of newer equipment designed to use such signals. However, legacy equipment that cannot use the high frame-rate signals may opt to use certain embodiments described herein that are designed to be backward-compatible. When backward-compatible, the video signal receiver generates suitable low frame-rate signals as well as the high frame-rate signals, thereby accommodating both legacy as well as newer equipment.

主权项

1. A method of propagating a video signal, the method comprising:
providing a high frame-rate input video bit stream to a video signal transmitter; generating from said high frame-rate input video bit stream, a first low frame-rate video bit stream, said first low frame-rate video bit stream comprising a blended frame that is generated by executing a blending process upon a plurality of frames of said high frame-rate video bit stream, wherein executing said blending process comprises calculating an average pixel value from a plurality of corresponding pixels in said plurality of frames of said high frame-rate video bit stream; generating from said high frame-rate input video bit stream, a second low frame-rate video bit stream, said second low frame-rate video bit stream comprising a packed frame that is generated by executing a first packing process upon said plurality of frames of said high frame-rate video bit stream, wherein executing said first packing process comprises using a Zeno packing algorithm to generate a Zeno frame from said plurality of frames of said high frame-rate video bit stream; deriving a secondary bit stream from said first low frame-rate video bit stream, wherein deriving said secondary bit stream from said first low frame-rate video bit stream comprises generating a reconstructed blended frame by decoding said base layer signal; generating a residual video bit stream by comparing said secondary bit stream to said second low frame-rate video bit stream, wherein said comparing comprises determining a difference signal between said second low frame-rate video bit stream and said secondary bit stream; encoding said first low frame-rate video bit stream to generate a base layer signal; encoding said residual video bit stream to generate an enhancement layer signal; and transmitting said base layer signal and said enhancement layer signal out of said video signal transmitter.