System and Method for Synchronization of Audio and Closed Captioning

摘要

A system and method for synchronizing audio from a program source with closed captioning data includes a caption encoder having a video-audio delay line. The caption encoder with the delay line is adapted to delay the programming source by a settable amount of time so that the program audio can be synchronized with closed caption data received from a remote live captioner.

主权项

1. A system for synchronization of program source audio and closed captioning comprising:
means for extracting and streaming program audio from a program source; a program source video/audio delay means; a closed caption data delay line wherein the delay can be varied; a closed caption data encoder which outputs closed caption data; and means for switching a source of caption data to the closed caption data encoder, the switching means being responsive to a content of caption data embedded in the program source and a source of caption data provided by a remote captioner to synchronize the caption data with the streaming program audio.