System and method for optimal transmission of a multitude of video pictures to one or more destinations
AssigneePolycom, Inc.
InventorsStephan Wenger, Herold Williams
Life of this patent
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Abstract
A system and method for optimal transmission of a multitude of video pictures consisting of end video encoders wherein more than one encoder is utilized. The system and method improve the image quality of a broadband image comprised of a plurality of images by generating a new bit rate encoder based upon a prior bit rate as determined by a bit rate determiner, thereby managing the distribution of available bandwidth.
Claims14
A video conferencing system, comprising,
- a plurality of cameras that capture a spatially adjacent scene,
- an encoding system comprising a plurality of encoders that compress and transmit a plurality of pictures from said plurality of cameras;
- said encoding system comprising a bit rate control manager coupled to each of said plurality of encoders for determining a bit rate for each of said plurality of encoders such that a quality of the reproduced bit stream produced by each of said plurality of encoders is substantially the same;
- wherein the quality of the reproduced bit streams is measured by one or more parameters selected from the group consisting of:
- a peak signal-to-noise ratio (PSNR) calculated between a plurality of uncoded source pictures and a plurality of produced reference pictures;
- a sum of square difference (SSD) calculated between a plurality of uncoded source pictures and a plurality of produced reference pictures;
- a Sum of Absolute Differences (SAD) calculated between a plurality of uncoded source pictures and a plurality of produced reference pictures.
A method of encoding video from a plurality of cameras using a plurality of encoders, wherein the plurality of cameras capture a spatially adjacent scene, the method comprising:
- receiving at least one parameter from each of the plurality of encoders, the parameter being indicative of a quality of a bitstream produced by the encoder;
- and
- determining a bit rate for each of the encoders as a function of the received parameters;
- wherein the at least one parameter is selected from the group consisting of:
- a peak signal-to-noise ratio (PSNR) calculated between a plurality of uncoded source pictures and a plurality of produced reference pictures;
- a sum of square difference (SSD) calculated between a plurality of uncoded source pictures and a plurality of produced reference pictures;
- a Sum of Absolute Differences (SAD) calculated between a plurality of uncoded source pictures and a plurality of produced reference pictures.
Dependencies are inferred from the claim text.