Patent ID: 8392958

Claim:
A communication system, comprising: a transmission apparatus, and a reception apparatus, wherein said transmission apparatus includes: an identification information insertion section configured to insert, into a blanking period of an image signal of a predetermined content to be transmitted, content identification information for the identification of a type of the predetermined content, and a transmission section configured to transmit the image signal having the content identification information inserted in the blanking period thereof by said identification information insertion section in the form of differential signals to said reception apparatus through a plurality of channels; and said reception apparatus includes: a reception section configured to receive the image signal, which has the content identification information inserted in the blanking period thereof, transmitted thereto in the form of differential signals from said transmission apparatus through the plurality of channels, a display processing section configured to carry out a process for displaying for the image signal received by said reception section, and a control section configured to control operation of said display processing section based on the content identification information inserted in the blanking period of the image signal received by said reception section, wherein the content identification information is formed from a plurality of data placed hierarchically.