Patent ID: 8345166
Filing Date: 2013-01-01
Classification: H04H,H04N

Abstract:
1. A broadcast receiving circuit which receives broadcast waves including a first service and a second service, and outputs either (i) audio data and video data included in the first service or (ii) audio data and video data included in the second service, said broadcast receiving circuit comprising: a first extracting unit configured to extract a first soundless period and first interval information from first audio data included in the first service, the first soundless period showing that an audio level which indicates volume of audio is as low as a predetermined audio level or below, and the first interval information indicating a time period between the first soundless period and a soundless period subsequent to the first soundless period; a second extracting unit configured to extract a second soundless period and second interval information from second audio data included in the second service, the second soundless period showing that an audio level which indicates volume of audio is as low as a predetermined audio level or below, and the second interval information indicating a time period between the second soundless period and a soundless period subsequent to the second soundless period; a simulcast determining unit configured to determine whether or not the broadcast waves are simulcast by comparing the first interval information with the second interval information; and a switching control unit configured to switch between (i) the output of the audio data and the video data included in the first service and (ii) the output of the audio data and the video data included in the second service based on a result of the determination by said simulcast determining unit.