Method and apparatus for measuring audiovisual synchronization

摘要

There is provided a method of measuring audiovisual synchronization between at least one encoded audio stream and at least one encoded video stream, comprising measuring the time of input into an audio encoder of source audio data to be encoded into said encoded audio stream, measuring the time of input into a video encoder of source video data to be encoded into said encoded video stream, determining a Presentation Time Stamp value, indicative of a time of presentation, for each of the respective at least one encoded audio stream and at least one encoded video stream, and transmitting a measured audio input time, a measured video input time and presentation time stamp values to a downstream component. There is also provided an apparatus and system for measuring audiovisual synchronization between at least one encoded audio stream and at least one encoded video stream.

主权项

1. A method of measuring audiovisual synchronization between at least one encoded audio stream and at least one encoded video stream, comprising:
measuring the time of input into an audio encoder of source audio data to be encoded into said encoded audio stream; measuring the time of input into a video encoder of source video data to be encoded into said encoded video stream; determining a Presentation Time Stamp value, indicative of a time of presentation, for each of the respective at least one encoded audio stream and at least one encoded video stream; calculating a difference between the time of presentation and the measured time of input for each of the at least one encoded audio stream and at least one encoded video stream; determining an audiovisual synchronization value from the calculated difference; and transmitting the audiovisual synchronization value to a downstream component.