Method and apparatus for encoding high-fidelity still images in MPEG bitstreams
First Claim
Patent Images
1. A method of encoding a high-fidelity still image in an MPEG bitstream, comprising the steps of:
- a) selecting a frame in an uncompressed digital video signal for encoding as a high-fidelity still image;
b) MPEG encoding the digital video signal, using additional bits to encode the selected frame, to produce an MPEG encoded bitstream.
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Abstract
A frame in an uncompressed digital video signal is selected for encoding as a high-fidelity still image. The digital video signal is MPEG encoded to produce an MPEG encoded bitstream and additional bits are employed to encode the selected frame, to produce the MPEG encoded bitstream. The additional bits are determined by fixing the values of MQUANT and "intra DC mult" for all macroblocks in the selected frame. In an alternative method, the extra bits are determined by repeating the selected frame a plurality of times in the digital video signal prior to encoding the selected frame.
140 Citations
24 Claims
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1. A method of encoding a high-fidelity still image in an MPEG bitstream, comprising the steps of:
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a) selecting a frame in an uncompressed digital video signal for encoding as a high-fidelity still image; b) MPEG encoding the digital video signal, using additional bits to encode the selected frame, to produce an MPEG encoded bitstream. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. Apparatus for producing an MPEG bitstream having one or more high-fidelity still images, comprising:
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a) means for generating an uncompressed digital video signal; b) means for selecting a frame in the uncompressed digital video signal to be compressed as a high-fidelity still image; c) means for repeating the selected frame in the uncompressed digital video signal; and d) an MPEG encoder for encoding the digital video signal containing repeated frames. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. Apparatus for producing an MPEG bitstream having one or more high-fidelity still images, comprising:
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a) means for generating an uncompressed digital video signal; b) means for selecting a frame in the uncompressed digital video signal to be compressed as a high-fidelity still image; c) an MPEG encoder for encoding the digital video signal; and d) means for keeping the quantization constant for each macroblock in the MPEG encoder.
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Specification