Patent ID: 8290065

Claim:
An analog back-end device for receiving at least one digital synchronizing signal and at least one encoded digital signal to generate at least one image analog signal, the analog back-end device comprising: a first digital-to-analog converter for receiving one of the digital synchronizing signals and converting the received digital synchronizing signal into an analog synchronizing signal wherein a number of significant bits of the first digital-to-analog converter is allocated according to a requirement on a resolution for the digital synchronizing signal; and a second digital-to-analog converter for receiving one of the encoded digital signals and converting the received encoded digital signal into an output analog signal wherein the number of significant bits of a second digital-to-analog converter is allocated according to the requirement on the resolution for the encoded digital signal; wherein the analog back-end device combines the analog synchronizing signal and the output analog signal at an output node to generate one of tile image analog signals; wherein the number of significant bits of the first digital-to-analog converter is less than that of the second digital-to-analog converter; wherein the at least one image analog signal is selected from the group consisting of the following: a Color, Video, Blanking, and Sync (CVBS) signal, a brightness Y signal of a S-video signal and a Y signal of a color difference video signal.