Rate adaptive video coding
First Claim
1. A method of encoding a sequence of video frames for transmission comprising encoding a sequence of frames under different conditions to produce a plurality of encoded bit streams each representing the sequence of frames, for transmission at different bit rates, and storing each of the encoded bit streams in a respective buffer, and outputting a bit stream from a buffer for transmission, the method further comprising switching between buffers to change the bit rate of the data for transmission, characterised in that at least one frame to be stored in one buffer is encoded with reference to a frame stored in another buffer.
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Abstract
A method of encoding a sequence of frames for transmission comprises encoding a sequence of frames under different conditions to produce a plurality of encoded bit streams each representing the sequence of frames, for transmission at different bit rates, and storing each of the encoded bit streams in a respective buffer, and outputting a bit stream from a buffer for transmission, and the method further comprises switching between buffers to change the bit rate of the data for transmission, wherein at least one frame to be stored in one buffer is encoded with reference to a frame stored in another buffer.
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22 Claims
- 1. A method of encoding a sequence of video frames for transmission comprising encoding a sequence of frames under different conditions to produce a plurality of encoded bit streams each representing the sequence of frames, for transmission at different bit rates, and storing each of the encoded bit streams in a respective buffer, and outputting a bit stream from a buffer for transmission, the method further comprising switching between buffers to change the bit rate of the data for transmission, characterised in that at least one frame to be stored in one buffer is encoded with reference to a frame stored in another buffer.
Specification