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公开(公告)号：US4821290A
公开(公告)日：1989-04-11
申请号：US237631
申请日：1988-08-26
申请人： Rajesh Hingorani , Nicola J. Fedele
发明人： Rajesh Hingorani , Nicola J. Fedele
摘要： A binary tree search system locates and outputs video data stored in a ROM, the data corresponding to received variable length uniquely encoded codewords. The data for each codeword is stored at a unique ROM address, each address corresponding to a tree leaf. Certain ROM locations not associated with complete codewords include a partial search address for the next search node, the remainder of the search address for each node comprising a bit of the serial received encoded data. When the received bits complete a codeword, the last received bit and the prior accessed ROM stored partial address form a pointer address to a tree leaf that accesses that ROM location containing the data corresponding to that codeword. Flags are generated by each accessed location to indicate whether or not a codeword has been found. If a codeword is found, the search is restarted at the tree root.
摘要翻译： 二叉树搜索系统定位并输出存储在ROM中的视频数据，该数据对应于接收到的可变长度唯一编码码字。 每个码字的数据被存储在唯一的ROM地址，每个地址对应于树叶。 与完整码字不相关联的某些ROM位置包括下一个搜索节点的部分搜索地址，每个节点的搜索地址的剩余部分包括一串串行接收编码数据。 当接收到的比特完成码字时，最后接收到的比特和先前存取的ROM存储的部分地址形成一个指向地址的树叶，该树叶访问包含对应于该码字的数据的ROM位置。 标志由每个访问的位置生成以指示是否已经找到码字。 如果找到一个代码字，搜索将在树根重新启动。
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2.发明授权Compressed quantized image-data transmission technique suitable for use in teleconferencing 失效适用于电话会议的压缩量化图像数据传输技术
公开(公告)号：US4663660A
公开(公告)日：1987-05-05
申请号：US876994
申请日：1986-06-20
CPC分类号： H04N19/186 , H04N19/503 , H04N19/593 , H04N19/61 , H04N19/619 , H04N19/63 , H04N19/10 , H04N19/115 , H04N19/146
摘要： A technique for transmitting compressed quantized image-data from a transmitter to a receiver over a limited bandwidth communication channel employs temporal differential pulse code modulation incorporating pyramid image processing spectrum analyzers and synthesizers. This technique permits the selective elimination by data-compression of only those portions of the original image information which contribute least to the perception of image quality by a viewer of a synthesized display image at the receiver.
摘要翻译： 在有限带宽通信信道上从发射机向接收机发送压缩量化图像数据的技术采用并入金字塔图像处理频谱分析仪和合成器的时间差分脉冲编码调制。 该技术允许通过数据压缩来选择性地消除原始图像信息的那些部分，这些部分对接收机处的合成显示图像的观众对图像质量的感知最不利。
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3.发明授权Method and apparatus for operating a transport stream encoder to produce a stream of packets carrying data representing a plurality of component signals 失效用于操作传输流编码器以产生携带表示多个分量信号的数据的分组流的方法和装置
公开(公告)号：US5574505A
公开(公告)日：1996-11-12
申请号：US442429
申请日：1995-05-16
IPC分类号： H04L12/801 , H04L12/911 , H04N7/10 , H04N7/52 , H04N19/00 , H04N21/236 , H04N21/2362 , H04N21/2389 , H04Q11/04 , H04N7/24
CPC分类号： H04N21/4347 , H04N21/2365 , H04N7/52
摘要： A method and apparatus are disclosed for operating a transport stream encoder to produce a stream of packets carrying data representing a plurality of component signals which comprises the following steps. The packet stream is partitioned into successive groups, each group containing a predetermined number of packet slots. A plurality of priority lists is maintained, one for each of the packet slots in the group. Each priority list contains a plurality of entries, and each entry identifies one of the component signals. When a packet slot is to be produced, the entries in the priority list corresponding to that packet slot are traversed, one at a time. For each of those entries it is determined whether the component signal identified by that entry can produce a packet. If it can, a packet containing data representing that component signal is produced. Only if none of the component signals identified by the entries in the priority list can produce a packet is a null packet produced.
摘要翻译： 公开了一种用于操作传输流编码器以产生携带表示多个分量信号的数据的分组流的方法和装置，其包括以下步骤。 分组流被划分成连续的组，每个组包含预定数量的分组时隙。 保持多个优先级列表，一组用于组中的每个分组时隙。 每个优先级列表包含多个条目，并且每个条目标识组件信号之一。 当要生成分组时隙时，遍历与该分组时隙对应的优先级列表中的条目，一次一个。 对于这些条目中的每一个，确定由该条目标识的分量信号是否可以产生分组。 如果可以，则产生包含表示该分量信号的数据的分组。 只有当优先级列表中的条目标识的分量信号都不能产生分组时，才产生一个空分组。
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4.发明授权
公开(公告)号：US4740832A
公开(公告)日：1988-04-26
申请号：US918275
申请日：1986-10-14
摘要： Computer main memory is used for storing relatively densely sampled luminance information concerning a television display and for storing relatively sparsely sampled chrominance information concerning the same television display. The relatively densely sampled luminance information is read out in substantially real-time from computer main memory during line trace intervals in the television display. The relatively sparsely sampled chrominance information is read out of computer main memory in advanced and compressed time during selected line retrace intervals in the television display.
摘要翻译： 计算机主存储器用于存储关于电视显示器的相对密集采样的亮度信息，并用于存储关于相同电视显示器的相对稀疏采样的色度信息。 相对密集采样的亮度信息在电视显示器中的线路间隔期间从计算机主存储器基本上实时地读出。 相对稀疏采样的色度信息在电视显示器中的选定行回扫间隔期间以高级和压缩时间从计算机主存储器中读出。
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5.发明授权Image storage using separately scanned luminance-detail and narrowband color-component variables 失效图像存储使用单独扫描的亮度细节和窄带颜色分量变量
公开(公告)号：US4779144A
公开(公告)日：1988-10-18
申请号：US20940
申请日：1987-03-02
CPC分类号： H04N1/646
摘要： Computer main memory is used for storing relatively densely sampled luminance detail information concerning a television display and for storing relatively sparsely sampled narrowband color-component information concerning the same television display. The relatively densely sampled luminance detail information is read out in substantially real-time from computer main memory during line trace intervals in the television display. The relatively sparsely sampled narrowband color-component information is read out of computer main memory in advanced and compressed time during selected line retrace intervals in the television display.
摘要翻译： 计算机主存储器用于存储关于电视显示器的相对密集采样的亮度细节信息，并用于存储关于相同电视显示器的相对稀疏采样的窄带彩色分量信息。 在电视显示器中的线路间隔期间，从计算机主存储器基本上实时地读出相对密集采样的亮度细节信息。 相对稀疏采样的窄带色分量信息在电视显示器中的选定行回扫间隔期间以高级和压缩时间从计算机主存储器中读出。
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6.发明授权
公开(公告)号：US4736239A
公开(公告)日：1988-04-05
申请号：US20843
申请日：1987-03-02
IPC分类号： G09G5/04 , G09G5/00 , G09G5/02 , G09G5/36 , G09G5/397 , G09G5/399 , H04N5/907 , H04N9/81 , H04N9/83 , H04N9/87 , H04N9/64
摘要： Computer main memory is used for storing relatively densely sampled wideband video information concerning a television display and for storing relatively sparsely sampled narrowband video information concerning the same television display. The relatively densely sampled wideband video information is read out in substantially real time from computer main memory during line trace intervals in the television display. The relatively sparsely sampled narrowband video information is read out of computer main memory in advanced and compressed time during selected line retrace intervals in the television display. The wideband video information may be luminance information; and the narrowband video information chrominance information.
摘要翻译： 计算机主存储器用于存储关于电视显示器的相对密集采样的宽带视频信息，并用于存储关于相同电视显示器的相对稀疏采样的窄带视频信息。 相对密集采样的宽带视频信息在电视显示器中的线路间隔期间从计算机主存储器基本上实时读出。 相对稀疏采样的窄带视频信息在电视显示器中的选定行回扫间隔期间以高级和压缩时间从计算机主存储器中读出。 宽带视频信息可以是亮度信息; 和窄带视频信息色度信息。
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7.发明授权Dual mode adder circuitry with overflow detection and substitution enabled for a particular mode 失效具有对特定模式启用的溢出检测和替换的双模式加法器电路
公开(公告)号：US5047975A
公开(公告)日：1991-09-10
申请号：US121022
申请日：1987-11-16
CPC分类号： G06F7/505 , G06F9/30036 , G06F2207/3828 , G06F7/49921
摘要： A video signal processor includes circuitry which may be conditioned by a mode control signal to operate as a single 16-bit adder or as two eight-bit adders. The circuitry includes two eight-bit adders, each of which has a carry-in input terminal and a carry-out output terminal. The carry-out output terminal of one of the adders is selectively coupled, via an AND gate, to the carry-in input terminal of the other adder. The AND gate is controlled by the mode control signal. In the mode where the circuitry operates as two eight-bit adders, additional circuitry is included to detect output values which may exceed the zero to 255 range of valid values and to saturate these invalid values either at zero or 255.
摘要翻译： 视频信号处理器包括可由模式控制信号调节的电路，以作为单个16位加法器或两个八位加法器运行。 电路包括两个八位加法器，每个加法器都具有输入输入端和输出输出端。 一个加法器的输出输出端子通过与门选择性地耦合到另一个加法器的进位输入端。 与门由模式控制信号控制。 在电路作为两个八位加法器工作的模式下，包括附加电路以检测可能超过零到255范围的有效值的输出值，并使这些无效值在零或255饱和。
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公开(公告)号：US4914675A
公开(公告)日：1990-04-03
申请号：US149556
申请日：1988-01-28
申请人： Nicola J. Fedele
发明人： Nicola J. Fedele
CPC分类号： G06F5/00 , H04N19/152 , H04N19/50
摘要： Variable-length codewords are grouped into successive N bit word groups in sequential order as received from a variable length codeword encoder. The N-bit groups are each stored in corresponding N-bit-wide memory locations in a buffer memory prior to transmission over a channel. The locations are filled to capacity on one clock pulse and emptied on a second clock pulse to efficiently utilize the memory at a given clock rate.
摘要翻译： 可变长度码字从可变长度码字编码器接收时，按顺序分组成连续的N位字组。 在通过信道传输之前，N位组各自存储在缓冲存储器中相应的N位宽的存储单元中。 这些位置在一个时钟脉冲上被填充到容量上，并在第二个时钟脉冲上被清空，以便以给定的时钟速率高效地利用存储器。
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公开(公告)号：US4813056A
公开(公告)日：1989-03-14
申请号：US130379
申请日：1987-12-08
申请人： Nicola J. Fedele
发明人： Nicola J. Fedele
CPC分类号： H03M7/42 , H04N19/152 , H04N19/50 , H04N19/93
摘要： A ROM includes a single dictionary of variable length codewords wherein Huffman codewords are assigned all members of the dictionary set, including one key codeword being assigned as a prefix codeword segment for a relatively large subgroup of the set, based on the combined probability of occurrence of the subgroup as compared to the individual probabilities of occurrences of the remaining members of the dictionary set. The key codeword is an indication of a departure from straightforward Huffman coding, to prepare an alternative coding scheme for developing a longer codeword which uses the key codeword as a prefix portion of that longer codeword. A unique suffix codeword segment follows the key codeword prefix for particularly identifying each member of the subgroup. The combined probability of occurrence of a member of the subgroup is higher than the probability of occurrence of codewords of shorter length, but the individual probabilities are significantly lower. The subgroup members can be assigned codeword lengths significantly shorter than codewords that would be assigned in straightforward Huffman coding.
摘要翻译： ROM包括可变长度码字的单个字典，其中霍夫曼码字被分配了字典集合的所有成员，包括基于组合的发生概率来分配作为集合的相对大的子组的前缀码字段的一个密钥码字 该子组与字典集合的剩余成员的出现个体概率相比较。 密钥码字是偏离直接霍夫曼编码的指示，以准备用于开发使用密钥码字作为该较长码字的前缀部分的较长码字的替代编码方案。 独特的后缀码字段遵循密钥码字前缀，用于特别标识子组的每个成员。 子组成员的合并发生概率高于短字长码字的出现概率，但个体概率明显较低。 子组成员可以分配明显短于将以简单霍夫曼编码分配的码字的码字长度。
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公开(公告)号：US07292163B1
公开(公告)日：2007-11-06
申请号：US11404411
申请日：2006-04-14
申请人： Nicola J. Fedele
发明人： Nicola J. Fedele
IPC分类号： H03M7/40
摘要： A circuit for encoding a data stream is described. The circuit comprises a non-zero count circuit coupled to receive the data stream and output a count of non-zero coefficients of a block of data of the data stream; a trailing ones detection circuit coupled to receive the data stream and output a number of trailing ones of the block of data; and a memory coupled to the non-zero count circuit and the trailing ones detection circuit and storing encoded data values, the memory outputting an encoded data value for a non-zero coefficient of a block of data based upon the count of non-zero coefficients and the number of trailing ones for the block of data. A method of encoding a data stream is disclosed.
摘要翻译： 描述用于对数据流进行编码的电路。 电路包括非零计数电路，其被耦合以接收数据流并输出数据流的数据块的非零系数的计数; 尾部检测电路，被耦合以接收所述数据流并输出所述数据块中的后续数据; 以及耦合到所述非零计数电路和所述后置检测电路并存储编码数据值的存储器，所述存储器基于非零系数的计数来输出数据块的非零系数的编码数据值 以及数据块的尾随数。 公开了一种对数据流进行编码的方法。
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