Patent
Method and system for compressing video data
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TLDR
In this article, a method for compressing video movie data to a specified target size using intra-frame and inter-frame compression schemes is proposed. But the method does not consider the quality of the original video data.Abstract:
A method for compressing video movie data to a specified target size using intraframe and interframe compression schemes. In intraframe compression, a frame of the movie is compressed by comparing adjacent pixels within the same frame. In contrast, interframe compression compresses by comparing similarly situated pixels of adjacent frames. The method begins by compressing the first frame of the video movie using intraframe compression. The first stage of the intraframe compression process does not degrade the quality of the original data, e.g., the method uses run length encoding based on the pixels' color values to compress the video data. However, in circumstances where lossless compression is not sufficient, the method utilizes a threshold value, or tolerance, to achieve further compression. In these cases, if the color variance between pixels is less than or equal to the tolerance, the method will encode the two pixels using a single color value--otherwise, the method will encode the two pixels using different color values. The method increases or decreases the tolerance to achieve compression within the target range. In cases where compression within the target range results in an image of unacceptable quality, the method will split the raw data in half and compress each portion of data separately. Frames after the first frame are generally compressed using a combination of intraframe and interframe compression. Additionally, the method periodically encodes frames using intraframe compression only in order to enhance random frame access.read more
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References
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Patent
Computer-based video compression system
TL;DR: In this article, a computer-based video compression system for processing natural information signals, such as video signals or audio signals, for the purpose of forming a compact data file of compressed signals which can be expanded to produce the original information signals is provided by a unique subsystem in a host computer which uses a high speed signal processor to compress video images and to expand video images.
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Adaptive hierarchical subband vector quantization encoder
TL;DR: In this paper, a method for data reduction of digital video signals based on vector quantization of vectors formed from coefficients of a discrete cosine transform of pixel blocks is presented. But the method is not suitable for video applications.
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TL;DR: In this paper, a geometric vector quantizer coding technique is illustrated in the context of a full motion video coder based on a three-dimensional sub-band framework, which is decomposed into different spatial-temporal frequency bands and based on the data in each band, different quantization strategies are applied to the bands.
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