Patents Represented by Law Firm Sinderbrank Alvin
  • Method for pulse code modulating a digital video signal
    Patent number: 4901139
    Abstract: In a system in which a digital video signal is transmitted with differential pulse code modulation, a predetermined number of samples alternate in a horizontal line of the digital video signal are grouped, and the center sample of the grouped samples of the digital video signal is transmitted with the original number of bits, while the other samples of a group are differentially modulated with reference to the respective center sample and are transmitted with the center sample as a cluster of samples.
    Type: Grant
    Filed: July 25, 1988
    Date of Patent: February 13, 1990
    Assignee: Sony Corporation
    Inventors: James H. Wilkinson, Ueda Mamoru