×

Methods and Devices to Use Two Different Clocks in a Television Digital Encoder

  • US 20080062311A1
  • Filed: 09/13/2006
  • Published: 03/13/2008
  • Est. Priority Date: 09/13/2006
  • Status: Abandoned Application
First Claim
Patent Images

1. An encoding device capable of using two clock frequencies to encode digital video data, the device comprising:

  • an input clock operating at a clock frequency other than 27 MHz;

    a phase-locked loop (PLL) configured to generate a 27 MHz clock from the input clock;

    a re-sampling module to convert luminance and chrominance data representing the digital video data from a 27 MHz clock domain to a clock domain of the input clock;

    a color subcarrier generator driven by the input clock to generate color subcarrier signals, the chrominance data from the re-sampling module are modulated by the color subcarrier signals, wherein modulated chrominance data are eventually combined with the luminance data from the re-sampling module; and

    a digital to analog converter (DAC) to convert the modulated chrominance data, which are eventually combined with the luminance data from the re-sampling module, into analog signals.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×