METHODS AND SYSTEMS FOR REAL TIME AUTOMATED CAPTION RENDERING TESTING

摘要

Exemplary methods and processing systems for determining whether an audio video (AV) source is performing closed captioning (CC) rendering properly, are described. An AV stream including one or more AV frames is received from the AV source; for each frame from the AV stream the following operations are performed: detecting a CC image in the frame; cropping the CC image from the frame; and outputting the CC image and metadata associated with the frame. A caption file is generated based on the AV stream, where the caption file includes captioning information for the AV stream. The CC image and metadata output for a frame from the AV stream are compared with CC information within the caption file related to that frame to determine whether the AV source is performing CC rendering properly.

主权项

1. A method in a processing system that is communicatively coupled to an audio video (AV) source capable of performing closed caption (CC) rendering, of determining whether the AV source is performing CC rendering properly, the method comprising:
receiving an AV stream including one or more AV frames from the AV source; for each frame from the AV stream performing the following:
detecting a CC image in the frame,cropping the CC image from the frame, andoutputting the CC image and metadata associated with the frame; generating based on the AV stream a caption file, wherein the caption file includes captioning information for the AV stream; comparing the CC image and metadata output for a frame from the AV stream with CC information within the caption file related to that frame; and automatically determining whether the AV source is performing CC rendering properly based on a result of the comparison of the CC image and metadata with the information within the caption file.