Full duplex single clip video codec

DC CAFC
  • US 5,781,788 A
  • Filed: 09/29/1997
  • Issued: 07/14/1998
  • Est. Priority Date: 05/08/1995
  • Status: Expired due to Term
First Claim
Patent Images

1. A video codec, comprising:

  • a single semiconductor chip providing for a video input connection from a camera and a video output connection to a monitor of decompressed data, and a transmit channel and a receive channel of compressed data;

    an interface connected to the chip for external connection to a separate frame memory dynamic random access memory (DRAM) and that provides for interim storage of incoming and outgoing video data; and

    a video compressor/decompressor disposed fully within the chip and connected to compress video information received from said video input connection for output on said transmit channel, and connected to decompress video information received from said receive channel for output on said video output connection;

    wherein, said compression of video information is by spatial de-correlation of intraframe information and temporal decorrelation of interframe information, and said transmit and receive channels have communication channel bit rates reduced by quantization and variable length coding.

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