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MPEG2 moving picture encoding/decoding system

  • US 6,310,962 B1
  • Filed: 08/19/1998
  • Issued: 10/30/2001
  • Est. Priority Date: 08/20/1997
  • Status: Expired due to Fees
First Claim
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1. An MPEG2 moving picture encoder to encode a video signal with digital watermark information and including a frame memory, a frame/field memory, an activity calculator, a rate controller, a Discrete Cosine Transform (DCT) unit, a quantizer, a dequantizer, an Inverse Discrete Cosine Transform (IDCT) unit, an adaptive estimator, a motion estimator, a variable length coder and multiplexer (VLC &

  • a MUX) and a buffer, the MPEG2 moving picture encoder comprising;

    a digital watermark inserter installed between said DCT and said VLC &

    MUX, to generate and discrete-cosine-transform the digital watermark information, and then embed the digital watermark information on a frequency domain of the video signal; and

    a digital watermark remover, installed between said dequantizer and said IDCT, to remove the digital watermark information on a spatial domain of the video signal, so as to prevent an error during estimating motion on a temporal domain for P and B pictures of the video signal.

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