Video MP3 system with apparatus and method for generating and restoring reduced video data
First Claim
1. A video MP3 system comprising:
- a portable enclosure, the contents of which comprise;
a micro-computer capable of controlling data processing steps and other components;
a memory device coupled to and controlled by the micro-computer, the memory device comprising stored compressed audio data and compressed video data;
an audio/video(AV) decoder coupled to and controlled by the micro-computer;
an audio reproducer coupled to the audio/video decoder; and
a video reproducer coupled to the audio/video decoder,wherein the compressed video data comprises a motion vector (MV) of an inter-frame, and discrete cosine transform (DCT) DC and DCT AC coefficients of an intra-frame, andwherein the AV decoder is configured to generate a DCT DC coefficient of the inter-frame by using the DC coefficient of the intra-frame and the motion vector of the inter-frame.
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Abstract
A video MP3 system including an audio/video (AV) decoder which further comprises a video decoder for restoring a moving picture signal in a MP3 player for restoring an audio signal, an apparatus and method for generating reduced video data which are appropriate for use in the video MP3 system, and an apparatus and method for restoring the reduced video data are provided. In the apparatus for generating reduced video data operated by a method for generating reduced video data, a video stream compressed according to rules of a MPEG is divided into a motion vector, a discrete cosine transform (DCT) DC coefficient, a DCT AC coefficient, and reduced video data, which are appropriate for use in the video MP3 system, are generated by using the motion vector, the discrete cosine transform (DCT) DC coefficient, and the DCT AC coefficient. In the apparatus for restoring reduced video data operated by a method for restoring reduced video data, an intra-frame is over-sampled by using a discrete cosine transform (DCT) DC coefficient and a DCT AC coefficient, and restored to a picture signal, and an inter-frame is motion compensated by using the motion vector and restored to a picture signal.
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Citations
11 Claims
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1. A video MP3 system comprising:
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a portable enclosure, the contents of which comprise; a micro-computer capable of controlling data processing steps and other components; a memory device coupled to and controlled by the micro-computer, the memory device comprising stored compressed audio data and compressed video data; an audio/video(AV) decoder coupled to and controlled by the micro-computer; an audio reproducer coupled to the audio/video decoder; and a video reproducer coupled to the audio/video decoder, wherein the compressed video data comprises a motion vector (MV) of an inter-frame, and discrete cosine transform (DCT) DC and DCT AC coefficients of an intra-frame, and wherein the AV decoder is configured to generate a DCT DC coefficient of the inter-frame by using the DC coefficient of the intra-frame and the motion vector of the inter-frame. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 11)
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9. A method for presenting audio and visual data in a portable device, the method comprising:
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storing compressed audio data and compressed video data in a memory device of the portable device; transmitting the stored audio data and video data to an audio/video decoder in the portable device; decoding the audio data to an audio signal; and decoding the video data to a video signal compatible with a display unit of the portable device, wherein the compressed video data comprises a motion vector (MV) of an inter-frame, a discrete cosine transform (DCT) DC and DCT AC coefficients of an intra-frame, and wherein the decoding the video data includes generating a DCT DC coefficient of the inter-frame by using the DC coefficient of the intra-frame and the motion vector of the inter-frame. - View Dependent Claims (10)
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Specification