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1.发明授权Transmitter, encoding system and method employing use of a bit need determiner for subband coding a digital signal 失效发射机，编码系统和采用使用位需求确定器的方法来对数字信号进行子带编码
公开(公告)号：US5365553A
公开(公告)日：1994-11-15
申请号：US144093
申请日：1993-10-27
摘要： Transmitter, encoding system and method for subband coding a digital signal. The encoding system includes a splitter for dividing the digital signal into subband signals SB.sub.1, . . . , SB.sub.M ; a quantizer unit for quantizing time-equivalent q sample signal blocks of the subband signals; a bit need determiner and a bit allocator. The bit need determiner determines a bit need b.sub.m which corresponds to the number of bits by which the q samples in a time-equivalent signal block in a subband signal SB.sub.m should be represented, where 1.ltoreq.m.ltoreq.M. The bit allocator allocates n.sub.m bits to each of the q samples of the time-equivalent signal block of subband signal SB.sub.m on the basis of the bit need b.sub.m and an available bit quantity B, n.sub.m being the number of bits by which the q samples in the time-equivalent signal block of subband signal SB.sub.m will actually be represented, where 1.ltoreq.m.ltoreq.M.
摘要翻译： 用于子带编码数字信号的发射机，编码系统和方法。 编码系统包括用于将数字信号划分为子带信号SB1的分离器。 。 。 ，SBM; 量化器单元，用于量化子带信号的时间等效q采样信号块; 有点需要确定器和一个位分配器。 位需要确定器确定对应于应当表示子带信号SBm中的时间等效信号块中的q个样本的比特数的位需要bm，其中1≤M≤M。 位分配器基于比特需要bm和可用比特量B将子比特分配给子带信号SBm的时间等效信号块的每个q样本中的每一个，其中，q是采样中的q个样本的比特数 实际上将表示子带信号SBm的时间等效信号块，其中1≤m≤M。
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2.发明授权Device for transmitting data words representing a digitalized analog signal and device for receiving the transmitted data words 失效用于发送表示数字化模拟信号的数据字的装置和用于接收所发送的数据字的装置
公开(公告)号：US5146457A
公开(公告)日：1992-09-08
申请号：US794319
申请日：1991-11-14
IPC分类号： G11B20/00 , G11B20/10 , G11B20/18 , H04B1/66 , H04B14/04 , H04J3/12 , H04N7/025 , H04N7/24 , H04N7/52 , H04N7/54
CPC分类号： H04N21/236 , G11B20/00007 , G11B20/10527 , G11B20/18 , H04B1/665 , H04J3/125 , H04N21/2383 , H04N21/434 , H04N21/4382 , H04N7/025 , H04N7/54
摘要： A system for transmitting digitized analog information includes, for the purpose of transmitting an additional information signal apparatus for modifying the bit of low significance of every n-th data word representing the digitized information depending on the bits of an additional information signal. The apparatus for modifying is constructed in such a way that the modification depends both on the additional information signal and on other bits such as the most significant bit b7 of the data word which are not correlated with the bits of the additional information signal. This results in the intercorrelation between the errors in the data words introduced by the modification being reduced, so that a flatter power density error spectrum is obtained and the errors introduced in the data words by the modification are less conspicuous. A system for recovering the additional information signal from received modified data words includes similar apparatus for reversing the modification.
摘要翻译： 用于发送数字化模拟信息的系统包括，用于根据附加信息信号的比特发送用于修改表示数字化信息的每个第n个数据字的低有效位的附加信息信号装置。 用于修改的装置被构造成使得修改既取决于附加信息信号又与其他比特，例如与附加信息信号的比特不相关的数据字的最高有效位b7。 这导致由修改引入的数据字中的误差之间的相互关系减小，从而获得更平坦的功率密度误差谱，并且通过修改引入的数据字中的误差不太显着。 用于从接收的修改数据字恢复附加信息信号的系统包括用于反转修改的类似装置。
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3.发明授权Transmitter, encoding system and method employing use of a bit allocation unit for subband coding a digital signal 失效发射机，编码系统和采用使用比特分配单元对数字信号进行子带编码的方法
公开(公告)号：US5367608A
公开(公告)日：1994-11-22
申请号：US144092
申请日：1993-10-27
摘要： Transmitter, encoding system and method for subband coding a digital signal. The encoding system includes a splitter unit for dividing the digital signal into subband signals SB.sub.1, . . . , SB.sub.p ; a quantizer unit for quantizing time-equivalent q sample signal blocks of the subband signals; a bit need determining unit and a bit allocation unit. The bit need determining unit determines a bit need b.sub.m which corresponds to the number of bits by which the q samples in a time-equivalent signal block in a subband signal SB.sub.m should be represented, where 1.ltoreq.m.ltoreq.P. The bit allocation unit allocates n.sub.m bits to each of the q samples of the time-equivalent signal block of subband signal SB.sub.m on the basis of the bit need b.sub.m and an available bit quantity B, n.sub.m being the number of bits by which the q samples in the time-equivalent signal block of subband signal SB.sub.m will be represented, where 1.ltoreq.m.ltoreq.P.
摘要翻译： 用于子带编码数字信号的发射机，编码系统和方法。 编码系统包括用于将数字信号划分为子带信号SB1的分离器单元。 。 。 ，SBp; 量化器单元，用于量化子带信号的时间等效q采样信号块; 有点需要确定单元和位分配单元。 位需要确定单元确定对应于应当表示子带信号SBm中的时间等效信号块中的q个样本的比特数的比特需求bm，其中1 = P。 比特分配单元基于比特需要bm和可用比特量B将子比特分配给子带信号SBm的时间等效信号块的q个样本中的每一个，其中，q是q个样本的比特数 在子带信号SBm的时间等效信号块中将被表示，其中1≤n≤P。
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4.发明授权System for transmitting a plurality of video programs simultaneously through a transmission channel 失效用于通过传输信道同时发送多个视频节目的系统
公开(公告)号：US5805220A
公开(公告)日：1998-09-08
申请号：US732311
申请日：1996-10-22
IPC分类号： H04N7/08 , H03M7/30 , H04N7/081 , H04N7/26 , H04N7/50 , H04N21/2365 , H04N21/434
CPC分类号： H04N19/40 , H04N19/115 , H04N19/124 , H04N19/14 , H04N19/184 , H04N19/61 , H04N21/23655 , H04N19/146 , H04N19/152
摘要： System for transmitting n video programs simultaneously through a transmission channel having a predetermined bitrate, comprising in cascade a decoding assembly and an encoding assembly. The decoding assembly consists of n parallel decoding means provided in parallel for decoding the coded input signals corresponding to said programs, and the encoding assembly consists of n encoding means being in cascade with each of said decoding means and each comprising a quantizer having a variable step size and a variable length encoder. The system also comprises means for controlling the step sizes of said encoding means in dependence upon their respective output bitrates, and these control means are also provided for controlling the output bitrates of said encoding means in dependence upon complexity values associated to the coded input signals of each decoding means with respect to the joint complexity of the plurality of said coded signals.
摘要翻译： PCT No.PCT / IB96 / 00138 Sec。 371日期1996年10月22日第 102（e）日期1996年10月22日PCT提交1996年2月22日PCT公布。 出版物WO96 / 26608 日期1996年8月29日用于通过具有预定比特率的传输信道同时发送n个视频节目的系统，包括级联解码组合和编码组件。 解码组合由并行提供的并行解码装置组成，用于对与所述程序相对应的编码输入信号进行解码，并且编码组件由与每个所述解码装置级联的n个编码装置组成，每个编码装置包括具有可变步长的量化器 尺寸和可变长编码器。 该系统还包括用于根据它们各自的输出比特率来控制所述编码装置的步长的装置，并且还提供这些控制装置，用于根据与编码输入信号相关联的复杂度值来控制所述编码装置的输出比特率 每个解码装置相对于多个所述编码信号的联合复杂度。
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5.发明授权Method of transmitting a digital video signal and a receiver for use in the method 失效传输数字视频信号的方法和接收机在该方法中的使用
公开(公告)号：US5122877A
公开(公告)日：1992-06-16
申请号：US576329
申请日：1990-08-31
申请人： Gerrit J. Keesman
发明人： Gerrit J. Keesman
摘要： For the transmission of a digital video signal via a transmission medium (11) consecutive pictures of N.times.M picture elements are subsivided into sub-pictures, a sub-picture being asembled from n.times.m picture elements. The maximum value and the minimum value (U.sub.max, U.sub.min) of a video signal component associated with the picture elements in a sub-picture are determined. In addition, the amplitudes of a video signal component associated with the picture elements in the sub-picture are quantized with a given number of p bits, by means of subdividing the dynamic range (DR) of the video signal component within this sub-picture, into 2.sup.p equal sub-ranges. At the receiver end dequantization is effected in the following manner. On dequantization, a value which is equal to the said maximum value (U.sub.max) is assigned, for at least one of the picture elements in the sub-picture for which the signal component has the highest quantized amplitude (U.sub.Qmax), to this (those) picture element(s), but in the event that there are two more of those picture elements, not to all those picture elements. For at least one of the picture elements in the sub-picture for which the video signal has the lowest quantized amplitude (U.sub.Qmin), a value which is equal to the minimum value (U.sub.min) is assigned to this (those) picture element(s) on dequantization, but not to all those picture elements in the event that there are two or more of those picture elements.
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6.发明授权Device for transmitting a plurality of television signals through a transmission channel 失效用于通过传输信道发送多个电视信号的装置公开(公告)号：US06377624B1
公开(公告)日：2002-04-23
申请号：US08304015
申请日：1994-09-09
申请人： Gerrit J. Keesman
发明人： Gerrit J. Keesman
IPC分类号： H04N712
CPC分类号： H04N5/9264 , H04N5/85 , H04N19/115 , H04N19/14 , H04N19/146 , H04N19/149 , H04N19/15 , H04N19/152 , H04N19/172 , H04N19/61 , H04N21/2365 , H04N21/4347
摘要： A device for simultaneously transmitting a plurality of television signals comprises an adjusting circuit (5) for adjusting the bitrate for each television signal in dependence upon the complexity of this signal with respect to the joint complexity of the plurality of television signals. The device provides improvement of quality in Digital Video Broadcast systems. It has also been found to be possible to transmit extra signals through a given channel while maintaining the picture quality. Use of the device in optical recording provides the possibility of a longer playing time.
摘要翻译： 用于同时发送多个电视信号的装置包括调整电路（5），用于根据该信号的复杂度相对于多个电视信号的联合复杂度调整每个电视信号的比特率。 该设备提高了数字视频广播系统的质量。 还发现可以通过给定的信道传输额外的信号，同时保持图像质量。 在光学记录中使用该设备可以延长播放时间。
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7.发明授权
公开(公告)号：US5729293A
公开(公告)日：1998-03-17
申请号：US496344
申请日：1995-06-29
申请人： Gerrit J. Keesman
发明人： Gerrit J. Keesman
CPC分类号： G06F17/147 , H04N19/37 , H04N19/40 , H04N19/30
摘要： A device for transcoding coded digital signals which are representative of a sequence of images, which device comprises a variable length decoding channel (12) followed by a variable length encoding and decoding channel (13), is described. According to the invention, a prediction sub-assembly (140) is connected in cascade between these two channels, and this sub-assembly comprises, in series, between two subtracters (114, 45), a picture memory (41) and a circuit (42) for motion compensation in view of displacement vectors which are representative of the motion of each image. Other implementations are possible, and particularly a scalable one in which said prediction sub-assembly comprises at least two and more generally a plurality of similar encoding and decoding channels arranged in cascade and corresponding to the same number of image quality levels.
摘要翻译： 描述代表图像序列的编码数字信号的装置，该装置包括随后是可变长度编码和解码信道（13）的可变长度解码信道（12）。 根据本发明，预测子组件（140）级联连接在这两个通道之间，该子组件串联包括两个减法器（114,45），图像存储器（41）和电路 （42），用于考虑表示每个图像的运动的位移矢量的运动补偿。 其他实现是可能的，特别是可伸缩的，其中所述预测子组件包括级联布置并对应于相同数量的图像质量水平的至少两个并且更一般地多个类似的编码和解码通道。
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公开(公告)号：US5768436A
公开(公告)日：1998-06-16
申请号：US637255
申请日：1996-04-24
申请人： Gerrit J. Keesman
发明人： Gerrit J. Keesman
CPC分类号： H04N19/19 , H04N19/126 , H04N19/147 , H04N19/149 , H04N19/176 , H04N19/60 , H04N19/146 , H04N19/152
摘要： The picture quality of an MPEG-encoded video signal is improved considerably by reducing the coefficients after quantization in such a way that the "Lagrangian cost" D+.lambda.R (D is distortion, R is bitrate) is minimal for a given value of the "Lagrange multiplier" .lambda.. The distortion decreases because the step size is reduced while the bitrate remains equal.
摘要翻译： MPEG编码视频信号的图像质量通过减小量化后的系数而显着改善，使得“拉格朗日代价”D + lambda R（D为失真，R为比特率）对于给定的“ 拉格朗日乘数“lambda。 由于在比特率保持相等的同时降低了步长，所以失真减小。
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9.发明授权
公开(公告)号：US5606369A
公开(公告)日：1997-02-25
申请号：US366340
申请日：1994-12-28
IPC分类号： H04N7/26 , G06T9/00 , H03M7/40 , H04N7/32 , H04N7/50 , H04N21/234 , H04N21/2365 , H04N21/434 , H04N21/44 , H04N7/12 , H04N7/24
CPC分类号： H04N21/23406 , H04N19/115 , H04N19/14 , H04N19/149 , H04N19/152 , H04N19/159 , H04N19/172 , H04N19/184 , H04N19/61 , H04N21/2365 , H04N21/23655 , H04N21/4347 , H04N19/146 , H04N19/50
摘要： Video signal encoding apparatus, suitably for multiple video channels (A,B) has respective encoder stages (10,12) which encode a received video signal according to a predetermined coding scheme, such as MPEG standard, and output a variable bit-rate data stream to encoder channel buffering (16) which is combined in a single buffer (16) having a fixed physical size with separate portions assigned to each channel. Buffer management (18) varies the size of the effective buffer areas assigned to the respective channels to maintain the total effective buffer area close to but within the physical limits of the buffer, as defined by the overall sum of encoder output bit rates. The outputs of the encoder buffer are combined into a single data stream, suitably by multiplexing (28), for subsequent separation and decoding by a receiver (30 to 36).
摘要翻译： 适用于多个视频通道（A，B）的视频信号编码装置具有根据诸如MPEG标准的预定编码方案对接收到的视频信号进行编码的相应编码器级（10,12），并输出可变比特率数据 流到编码器信道缓冲（16），其被组合在具有固定物理大小的单个缓冲器（16）中，分配给每个信道的分离部分。 缓冲器管理（18）改变分配给相应通道的有效缓冲区的大小，以使得总有效缓冲区保持在缓冲器的物理限制内，但由编码器输出比特率的总和定义。 编码器缓冲器的输出通过多路复用（28）合并成单个数据流，用于接收器（30至36）的后续分离和解码。
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公开(公告)号：US06944221B1
公开(公告)日：2005-09-13
申请号：US08901338
申请日：1997-07-28
申请人： Gerrit J. Keesman
发明人： Gerrit J. Keesman
CPC分类号： H04N21/44004 , H04N19/115 , H04N19/124 , H04N19/14 , H04N19/146 , H04N19/152 , H04N19/177 , H04N19/184 , H04N19/50 , H04N19/61 , H04N21/23406
摘要： A method of compression is provided for transmission of digital video signals between an encoder buffer and a decoder buffer. A tunable delay is provided at the encoder, suitably in the form of a portion of encoder buffer memory, with data being read out to a communications channel at a rate determined by the input bit rate of signals received a predetermined number of frame periods later. Use of the tunable delay improves efficiency of decoder buffering by maintaining a relatively constant level of decoder buffer fullness irrespective of signal bit rates.
摘要翻译： 提供压缩方法用于在编码器缓冲器和解码器缓冲器之间传输数字视频信号。 适当地以编码器缓冲存储器的一部分的形式在编码器处提供可调延迟，其中数据以由接收到预定数量的帧周期的信号的输入比特率确定的速率被读出到通信信道。 使用可调延迟通过维持解码器缓冲器充满度相对恒定的水平，而不管信号比特率如何，提高了解码器缓冲的效率。
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