Patent ID: 8724034
Filing Date: 2014-05-13
Classification: H04N

Abstract:
1. An apparatus for scanning channels in a television signal receiver, said apparatus comprising: a first acquisition circuit configured to determine, during a first time period, whether a first radio frequency channel has a first format and to produce a first acquisition indicator in response thereto; a second acquisition circuit configured to determine, during a second time period overlapping said first time period, whether said first radio frequency channel has a second format, wherein said second format is different from said first format, and to produce a second acquisition indicator in response thereto; and a controller configured to scan a plurality of radio frequency channels by operating, in response to states of said first acquisition indicator and said second acquisition indicator, said first acquisition circuit and said second acquisition circuit, wherein operation of said first acquisition circuit on said first radio frequency channel is terminated in said second time period if said second acquisition circuit successfully acquires said first radio frequency channel, and wherein operation of said second acquisition circuit on said first radio frequency channel is terminated in said first time period if said first acquisition circuit successfully acquires said first radio frequency channel.