DYNAMIC PICTURE QUALITY CONTROL

摘要

A method performed by one or more computing devices. The method includes identifying first and second portions of a digital video signal. First and second values of a plurality of quality metrics are determined for the first and second portions, respectively. The first and second values of the metrics are used to determine first and second values, respectively, of a plurality of picture quality parameters such that a signal transmitted using either the first or second values of the parameters would require at most a maximum output bitrate. The first values of the parameters may differ from the second values of the parameters. The first and second portions are adjusted using the first and second values, respectively, of the parameters. The first and second adjusted portions are transmitted in a continuous signal. Optionally, the first and second adjusted portions are compressed before they are transmitted.

主权项

1. A computer-implemented method performed by one or more computing devices, the method comprising:
identifying first and second portions of an uncompressed digital video signal; determining first values of a plurality of quality metrics for the first portion of the uncompressed digital video signal; determining second values of the plurality of quality metrics for the second portion of the uncompressed digital video signal; determining first values for a plurality of picture quality parameters based at least in part on the first values of the plurality of quality metrics such that a signal transmitted using the first values of the plurality of picture quality parameters requires at most a maximum output bitrate; determining second values for the plurality of picture quality parameters based at least in part on the second values of the plurality of quality metrics such that a signal transmitted using the second values of the plurality of picture quality parameters requires at most the maximum output bitrate; adjusting the first portion using the first values of the plurality of picture quality parameters; adjusting the second portion using the second values of the plurality of picture quality parameters; and transmitting the first adjusted portion and the second adjusted portion in a continuous signal.