Digital broadcast transmitter, digital broadcast receiver, and audio description descriptor processing methods thereof

摘要

A digital broadcast receiver is provided. The digital broadcast receiver includes a broadcast reception unit which receives a digital broadcast signal; a signal separation unit which separates a main audio signal, an auxiliary audio signal, and an audio description descriptor from the received digital broadcast signal; an extraction unit which extracts auxiliary information from the audio description descriptor; a mixing unit which generates an audio signal by mixing the main audio signal and the auxiliary audio signal based on the auxiliary information; and an audio output unit which outputs the audio signal.

主权项

1. A digital broadcast receiver comprising:
a broadcast reception unit which receives a digital broadcast signal; a signal separation unit which separates a main audio signal, an auxiliary audio signal comprising an audio description for providing an audio message related to visually displayed content of a broadcast program or an Emergency Alert System (EAS) audio signal, and an audio description descriptor indicating whether the broadcast program includes the audio description or the EAS audio signal from the received digital broadcast signal; an extraction unit which extracts auxiliary information from the audio description descriptor; a mixing unit which generates an audio signal by mixing the main audio signal and the auxiliary audio signal based on the auxiliary information; and an audio output unit which outputs the audio signal.