Methods and apparatuses for temporal synchronisation between the video bit stream and the output video sequence

摘要

A method for temporally synchronizing an input bit stream of a video decoder with a processed video sequence decoded by an external video decoder includes the steps of: capturing the input bit stream and supplying it to a bit stream analyzer; parsing and analyzing the captured input bit stream by the bit stream analyzer; decoding the input bit stream and providing reconstructed images Nrec therefrom; storing the reconstructed images Nrec in a buffer; and comparing a processed video sequence received from the output side of the video decoder with each of the stored reconstructed images, to find a matching frame n* from the reconstructed images in the buffer.

主权项

1. A method for temporally synchronizing an input video bit stream with a processed video sequence corresponding to the input video bit stream decoded by an external video decoder, the method comprising the steps of:
supplying the input video bit stream to a bit stream analyzer of a probe device;
parsing and analyzing, by the bit stream analyzer of the probe, the input video bit stream;decoding, by a decoder of the probe, at least a portion of the input video bit stream to generate reconstructed images;storing the reconstructed images in a buffer; andcomparing, by the probe, frames of the processed video sequence with each of the stored reconstructed images to find a matching frame n*; andproviding, by the probe, a hybrid video quality assessment based on the matching frame n*.