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1. 发明申请

WO1993010636A1 IMAGE COMPRESSION METHOD AND APPARATUS EMPLOYING DISTORTION ADAPTIVE TREE SEARCH VECTOR QUANTIZATION 审中-公开
标题翻译：图像压缩方法和设备使用失真自适应树搜索矢量量化
公开(公告)号：WO1993010636A1
公开(公告)日：1993-05-27
申请号：PCT/US1992009840
申请日：1992-11-17
申请人： UTAH STATE UNIVERSITY FOUNDATION
发明人： UTAH STATE UNIVERSITY FOUNDATION , ISRAELSEN, Paul, Dee
IPC分类号： H04N07/13
CPC分类号： H03M7/3082 , G06T9/40 , H04N19/124 , H04N19/13 , H04N19/146 , H04N19/152 , H04N19/176 , H04N19/184 , H04N19/60 , H04N19/91 , H04N19/94
摘要： A variable rate vector quantization method employs a tree structured codebook (114). The level of the codebook from which codevectors are selected is determined by a threshold (116). The threshold varies according to the fullness of a buffer (118) which stores vector quantized data to be transmitted.

2. 发明申请

WO1990015505A1 FRAME-TO-FRAME COMPRESSION OF VECTOR QUANTIZED SIGNALS AND OTHER POST-PROCESSING 审中-公开
标题翻译：矢量量化信号和其他后处理的帧对帧压缩
公开(公告)号：WO1990015505A1
公开(公告)日：1990-12-13
申请号：PCT/US1990002918
申请日：1990-05-30
申请人： UTAH STATE UNIVERSITY FOUNDATION
发明人： UTAH STATE UNIVERSITY FOUNDATION , ISRAELSEN, Paul, Dee , HARRIS, Richard, W.
IPC分类号： H04N07/13
CPC分类号： H03M7/3082 , H04N7/10 , H04N7/20 , H04N19/94
摘要： The present invention comprises a technique for post-quantization processing. A quantizer is disclosed which organizes frames of data into frames of input vectors. For each input vector, the quantizer indentifies a closely matching codebook vector. The quantizer generates a compressed signal by replacing each input vector in a frame with an ID code of a closely matching codebook vector. On subsequent frames, the quantizer further processes ID codes to achieve additional compression. In one embodiment, the ID codes from one frame are compared to the corresponding ID codes in the previous frames. IF the ID code from the subsequent frame (new ID code) is the same as the corresponding ID code from the previous frame (old ID code), the new ID code is eliminated from the frame. A "no change identifier" (called a "tag bit") is set to indicate that the ID code was eliminated. Similarly, if the new ID code represents a vector which is only slightly different from the vector represented by the old ID code, the new ID code is replaced with a tag bit. In this way, transmission of the subsequent frames requires only the transmission of vectors which differ by a significant amount from the prior frame. In other embodiments, other post processing methods are used. For example, lossless coding techniques, such as the so-called Lempel-Ziv and Huffman codes are discussed.
摘要翻译：本发明包括用于后量化处理的技术。公开了一种量化器，其将数据帧组织成输入向量的帧。对于每个输入向量，量化器识别紧密匹配的码本矢量。量化器通过用一个紧密匹配的码本矢量的ID码替换帧中的每个输入矢量来产生压缩信号。在后续帧中，量化器进一步处理ID码以实现额外的压缩。在一个实施例中，将来自一个帧的ID码与先前帧中的相应ID码进行比较。如果来自后续帧（新ID码）的ID码与来自前一帧（旧ID码）的相应ID码相同，则从帧中消除新的ID码。设置“无变化标识符”（称为“标签位”）来表示ID代码被消除。类似地，如果新的ID代码表示与由旧的ID代码表示的向量稍微不同的向量，则新的ID代码被替换为标记位。以这种方式，后续帧的传输仅需要与现有帧相差大量的向量的传输。在其他实施例中，使用其他后处理方法。例如，讨论了无损编码技术，例如所谓的Lempel-Ziv和霍夫曼码。

3. 发明申请

WO1990012460A1 VECTOR QUANTIZER CODEBOOK PROCESSING CIRCUIT 审中-公开
标题翻译：矢量量器编码处理电路
公开(公告)号：WO1990012460A1
公开(公告)日：1990-10-18
申请号：PCT/US1990001761
申请日：1990-04-05
申请人： UTAH STATE UNIVERSITY FOUNDATION
发明人： UTAH STATE UNIVERSITY FOUNDATION , ISRAELSEN, Paul, Dee
IPC分类号： H03M07/30
CPC分类号： H03M7/3082 , G06T9/008 , H04N19/94
摘要： The invention relates to an electronic circuit (10) for quantizing vector signals. The circuit (10) compares an image vector to codebook entries which are representative vectors from a vector space. The circuit (10) provides an indication as to which codebook vector most closely matches the image vector. Selection circuitry (121) is provided for comparing the distance values between the image vectors and codebook entries to generate an output signal representative of the codebook vector having the smallest distance.
摘要翻译：本发明涉及用于量化矢量信号的电子电路（10）。电路（10）将图像矢量与来自矢量空间的代表矢量的码本条目进行比较。电路（10）提供关于哪个码本矢量与图像矢量最接近匹配的指示。提供选择电路（121）用于比较图像矢量和码本条目之间的距离值，以产生表示具有最小距离的码本矢量的输出信号。

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