公开(公告)号：US5184229A

公开(公告)日：1993-02-02

申请号：US444701

申请日：1989-12-01

申请人： Osamu Saito ,  Kenji Ito ,  Kenji Moronaga ,  Mikio Watanabe

发明人： Osamu Saito ,  Kenji Ito ,  Kenji Moronaga ,  Mikio Watanabe

IPC分类号： G06T9/00 ,  H04N7/26 ,  H04N7/30

CPC分类号： H04N19/184 ,  H04N19/126 ,  H04N19/14 ,  H04N19/176 ,  H04N19/18 ,  H04N19/60 ,  H04N19/124 ,  H04N19/13 ,  H04N19/146 ,  H04N19/91

摘要： A device for coding a picture signal by compression produces, when detected that the amplitude of data which has undergone two-dimensional orthogonal transform and then normalized has overflown, data specifying the normalized data in addition to coded data of the normalized data. A decoding device, therefore, is capable of accurately decoding original picture data despite the overflow. When a block of picture data lies in a predetermined range which occurs with relatively low probability, the picture data is transformed into coded data which includes a predetermined code. When the block of picture data does not lie in such a range, the picture data is converted into Huffman-coded data. This reduces the required capacity of a look-up table for coding.

摘要翻译： 当检测到已经经过二维正交变换然后归一化的数据的幅度已经溢出时，用于通过压缩对图像信号进行编码的装置产生除了归一化数据的编码数据之外指定归一化数据的数据。 因此，解码装置能够精确地解码原始图像数据，而不管溢出。 当图像数据块位于以相对较低概率发生的预定范围内时，图像数据被变换成包括预定码的编码数据。 当图像数据块不在这样的范围内时，图像数据被转换成霍夫曼编码的数据。 这减少了编码查找表的所需容量。

公开(公告)号：US6111987A

公开(公告)日：2000-08-29

申请号：US947464

申请日：1997-10-09

申请人： Mikio Watanabe ,  Kenji Ito ,  Kenji Moronaga

发明人： Mikio Watanabe ,  Kenji Ito ,  Kenji Moronaga

IPC分类号： H03M7/30 ,  G06T9/00 ,  H04N1/41 ,  H04N1/415 ,  H04N19/102 ,  H04N19/115 ,  H04N19/126 ,  H04N19/132 ,  H04N19/134 ,  H04N19/136 ,  H04N19/14 ,  H04N19/146 ,  H04N19/149 ,  H04N19/172 ,  H04N19/176 ,  H04N19/186 ,  H04N19/189 ,  H04N19/194 ,  H04N19/196 ,  H04N19/423 ,  H04N19/60 ,  H04N19/625 ,  H04N19/85 ,  H04N19/91 ,  H04N19/93 ,  G06K9/46

CPC分类号： G06T9/007

摘要： A device for coding picture data by compression, and a method thereof. By preprocessing, the device calculates a picture activity of one frame of picture data. A quantizing table circuit selects a particular quantizing step matching the picture activity and sets it in a quantizing circuit 32. On a first path, one frame of picture data is fed to a discrete cosine transform (DCT) circuit to be thereby subjected to orthogonal transform. The quantizing circuit sequentially quantizes DC components, low frequency components and high frequency components of the resulting output of the DCT circuit in ascending order of frequency block by block according to a quantizing step set therein. The picture data from the quantizing circuit are coded by Huffman coding while a code counter counts the coded data. The quantizing step set in the quantizing circuit is updated on the basis of the amount of coded data and a target amount of codes. On a second path, the same one frame of picture data is again fed to the DCT circuit to undergo orthogonal transform and compression, as on the first path. The coded picture data are sent to a memory card or similar picture data storing means. A bit distributing circuit produces a bit distribution value block by block. When the output count of the code counter associated with one block reaches the bit distribution value, the DCT circuit, quantizing circuit and Huffman coding circuit are disenabled while an EOB (End Of Block) code is added to the end of the block of coded picture data.

摘要翻译： 用于通过压缩对图像数据进行编码的装置及其方法。 通过预处理，设备计算一帧图像数据的图像活动。 量化表电路选择与图像活动相匹配的特定量化步骤并将其设置在量化电路32中。在第一路径上，将一帧图像数据馈送到离散余弦变换（DCT）电路，从而进行正交变换 。 量化电路根据其中设定的量化步骤，按照频率逐个按顺序按顺序量化DCT电路的所得输出的DC分量，低频分量和高频分量。 来自量化电路的图像数据通过霍夫曼编码进行编码，而代码计数器对编码数据进行计数。 基于编码数据量和目标代码量，更新量化电路中设置的量化步骤。 在第二路径上，如同第一路径那样，将相同的一帧图像数据再次馈送到DCT电路进行正交变换和压缩。 编码图像数据被发送到存储卡或类似的图像数据存储装置。 位分配电路逐块产生位分配值。 当与一个块相关联的代码计数器的输出计数达到位分配值时，DCT电路，量化电路和霍夫曼编码电路被禁用，而将EOB（块结束）码添加到编码图像块的末尾 数据。

公开(公告)号：US5126857A

公开(公告)日：1992-06-30

申请号：US529635

申请日：1990-05-29

申请人： Mikio Watanabe ,  Kenji Ito ,  Kenji Moronaga

发明人： Mikio Watanabe ,  Kenji Ito ,  Kenji Moronaga

IPC分类号： H04N1/41 ,  G06T9/00 ,  H04N5/926 ,  H04N9/804 ,  H04N11/04

CPC分类号： H04N5/9264 ,  H04N11/042 ,  H04N19/115 ,  H04N19/14 ,  H04N19/149 ,  H04N19/176 ,  H04N19/18 ,  H04N19/60 ,  H04N9/8047 ,  H04N19/146

摘要： A device for coding color picture data by compression maintains compressed data in a predetermined length and prevents the amount of DC signal component data to be allocated from becoming short. A luminance signal and chrominance signals Cr and Cb are compressed independently of each other and recorded as discrete DC components and AC components. When the amount of data of DC components of the chrominance signal Cr or Cb is greater than the total amount of data assigned to the signal Cr or Cb, the amount of data assigned to the signal Cr or Cb is increased to equal the amount of data of DC components of the signal Cr or Cb while the shortage is subtracted from the allocation of AC component data of the luminance signal Y. This insures the allocation of a sufficient amount of data to the coded data of DC components at all times.

摘要翻译： 用于通过压缩来对彩色图像数据进行编码的装置维持预定长度的压缩数据，并且防止DC信号分量数据量的分配变短。 亮度信号和色度信号Cr和Cb彼此独立地被压缩并被记录为离散DC分量和AC分量。 当色度信号Cr或Cb的DC分量的数据量大于分配给信号Cr或Cb的数据的总量时，分配给信号Cr或Cb的数据量增加到等于数据量 的信号Cr或Cb的DC分量，同时从亮度信号Y的AC分量数据的分配中减去不足。这保证了对DC分量的编码数据始终分配足够的数据。

公开(公告)号：US5732156A

公开(公告)日：1998-03-24

申请号：US396894

申请日：1995-03-01

申请人： Mikio Watanabe ,  Kenji Ito ,  Kenji Moronaga

发明人： Mikio Watanabe ,  Kenji Ito ,  Kenji Moronaga

IPC分类号： H03M7/30 ,  G06T9/00 ,  H04N1/41 ,  H04N1/415 ,  H04N19/102 ,  H04N19/115 ,  H04N19/126 ,  H04N19/132 ,  H04N19/134 ,  H04N19/136 ,  H04N19/14 ,  H04N19/146 ,  H04N19/149 ,  H04N19/172 ,  H04N19/176 ,  H04N19/186 ,  H04N19/189 ,  H04N19/194 ,  H04N19/196 ,  H04N19/423 ,  H04N19/60 ,  H04N19/625 ,  H04N19/85 ,  H04N19/91 ,  H04N19/93 ,  G06K9/46

CPC分类号： G06T9/007

摘要： A device for coding picture data by compression, and a method thereof are provided. By preprocessing, the device calculates a picture activity of one frame of picture data. A quantizing table circuit selects a particular quantizing step matching the picture activity and sets the picture activity in a quantizing circuit. On a first path, one frame of picture data is fed to a discrete cosine transform (DCT) circuit to be thereby subjected to orthogonal transform. The quantizing circuit sequentially quantizes DC components, low frequency components and high frequency components of the resulting output of the DCT circuit in ascending order of frequency block by block according to a quantizing step set therein. The picture data from the quantizing circuit are coded by Huffman coding while a code counter counts the coded data. The quantizing step set in the quantizing circuit is updated on the basis of the amount of coded data and a target amount of codes. On a second path, the same one frame of picture data is again fed to the DCT circuit to undergo orthogonal transform and compression, as on the first path. The coded picture data are sent to a memory card or similar picture data storing medium. A bit distributing circuit produces a bit distribution value block by block. When the output count of the code counter associated with one block reaches the bit distribution value, the DCT circuit, quantizing circuit and Huffman coding circuit are disenabled while an EOB (End of Block) code is added to the end of the block of coded picture data.

摘要翻译： 提供了一种通过压缩对图像数据进行编码的装置及其方法。 通过预处理，设备计算一帧图像数据的图像活动。 量化表电路选择与图像活动相匹配的特定量化步骤，并设置量化电路中的图像活动。 在第一路径上，将一帧图像数据馈送到离散余弦变换（DCT）电路，从而进行正交变换。 量化电路根据其中设定的量化步骤，按照频率逐个按顺序按顺序量化DCT电路的所得输出的DC分量，低频分量和高频分量。 来自量化电路的图像数据通过霍夫曼编码进行编码，而代码计数器对编码数据进行计数。 基于编码数据量和目标代码量，更新量化电路中设置的量化步骤。 在第二路径上，如同第一路径那样，将相同的一帧图像数据再次馈送到DCT电路进行正交变换和压缩。 编码图像数据被发送到存储卡或类似的图像数据存储介质。 位分配电路逐块产生位分配值。 当与一个块相关联的代码计数器的输出计数达到位分配值时，DCT电路，量化电路和霍夫曼编码电路被禁用，而将EOB（块结束）码添加到编码图像块的末尾 数据。

公开(公告)号：US5729633A

公开(公告)日：1998-03-17

申请号：US659882

申请日：1996-06-07

申请人： Mikio Watanabe ,  Kenji Ito ,  Kenji Moronaga

发明人： Mikio Watanabe ,  Kenji Ito ,  Kenji Moronaga

IPC分类号： H03M7/30 ,  G06T9/00 ,  H04N1/41 ,  H04N1/415 ,  H04N19/102 ,  H04N19/115 ,  H04N19/126 ,  H04N19/132 ,  H04N19/134 ,  H04N19/136 ,  H04N19/14 ,  H04N19/146 ,  H04N19/149 ,  H04N19/172 ,  H04N19/176 ,  H04N19/186 ,  H04N19/189 ,  H04N19/194 ,  H04N19/196 ,  H04N19/423 ,  H04N19/60 ,  H04N19/625 ,  H04N19/85 ,  H04N19/91 ,  H04N19/93 ,  G06K9/36

CPC分类号： G06T9/007

摘要： A device for coding picture data by compression, and a method thereof. By preprocessing, the device calculates a picture activity of one frame of picture data. A quantizing table circuit selects a particular quantizing step matching the picture activity and sets it in a quantizing circuit 32. On a first path, one frame of picture data is fed to a discrete cosine transform (DCT) circuit to be thereby subjected to orthogonal transform. The quantizing circuit sequentially quantizes DC components, low frequency components and high frequency components of the resulting output of the DCT circuit in ascending order of frequency block by block according to a quantizing step set therein. The picture data from the quantizing circuit are coded by Huffman coding while a code counter counts the coded data. The quantizing step set in the quantizing circuit is updated on the basis of the amount of coded data and a target amount of codes. On a second path, the same one frame of picture data is again fed to the DCT circuit to undergo orthogonal transform and compression, as on the first path. The coded picture data are sent to a memory card or similar picture data storing means. A bit distributing circuit produces a bit distribution value block by block. When the output count of the code counter associated with one block reaches the bit distribution value, the DCT circuit, quantizing circuit and Huffman coding circuit are disenabled while an EOB (End Of Block) code is added to the end of the block of coded picture data.

公开(公告)号：US5101280A

公开(公告)日：1992-03-31

申请号：US524389

申请日：1990-05-17

申请人： Kenji Moronaga ,  Kenji Ito ,  Mikio Watanabe

发明人： Kenji Moronaga ,  Kenji Ito ,  Mikio Watanabe

IPC分类号： H04N1/415 ,  G06T9/00

CPC分类号： H04N19/18 ,  H04N19/126 ,  H04N19/14 ,  H04N19/149 ,  H04N19/176 ,  H04N19/60 ,  H04N19/124 ,  H04N19/146 ,  H04N19/152

摘要： A picture signal compression coding device is disclosed which divides digital picture data constituting a single picture into a plurality of blocks and codes the picture data block by block by two-dimensional orthogonal transformation. An orthogonal transforming section transforms the digital picture data divided into the plurality of blocks by two-dimensional orthogonal transformation. A normalizing section normalizes the transformed data, while a coding section codes the normalized data. A block activity calculating section calculates an activity of the picture data block by block. An activity summing section sums the block-by-block activities to produce a total activity. A coded data distributing section calculates an amount of coded data to be distributed to each of the blocks on the basis of the ratio of the block-by-block activity to the total activity. A coded output control section limits the amount of coded data to be distributed to each of the blocks from the coding section in response to an output of the coded data distributing section. The block activity calculating section has a subdividing section for subdividing each of the blocks of picture data into a plurality of subblocks, a subblock activity calculating section for calculating the activity of the picture data subblock by subblock, and a difference calculating section for determining a difference between nearby ones of the subblocks with respect to the mean value of subblock-by-subblock picture data.

摘要翻译： 公开了一种图像信号压缩编码装置，其将构成单个图像的数字图像数据分成多个块，并通过二维正交变换逐块地对图像数据块进行编码。 正交变换部通过二维正交变换来变换分割为多个块的数字图像数据。 规范化部分归一化变换后的数据，而编码部分对归一化数据进行编码。 块活动计算部分逐块地计算图像数据块的活动。 活动总结部分将逐块活动相加以产生总体活动。 编码数据分配部分根据逐块活动与总活动的比例来计算要分配给每个块的编码数据量。 编码输出控制部分响应于编码数据分配部分的输出，将编码数据的数量从编码部分限制到每个块。 块活动性计算部分具有用于将图像数据块中的每一个块细分为多个子块的细分部分，用于通过子块计算图像数据子块的活动度的子块活动计算部分和用于确定差异的差分计算部分 在子块之间的子块相对于子块子块图像数据的平均值之间。

公开(公告)号：US5032927A

公开(公告)日：1991-07-16

申请号：US317517

申请日：1989-03-01

申请人： Mikio Watanabe ,  Kenji Ito ,  Seiki Nishi

发明人： Mikio Watanabe ,  Kenji Ito ,  Seiki Nishi

IPC分类号： G11B27/34 ,  H04N1/21 ,  H04N5/77 ,  H04N5/926

CPC分类号： H04N1/32128 ,  G11B27/34 ,  H04N5/772 ,  H04N5/9264 ,  H04N5/9267 ,  H04N2201/212 ,  H04N2201/3225 ,  H04N2201/3264 ,  H04N2201/3277

摘要： An image signal recording apparatus achieves an orthogonal transform and a compression coding on image data so as to record the resultant data in a recoding medium. There is disposed a selector to select a compression ratio for the compression coding of the data, namely, the compression ratio is selectable. The selected compression ratio data is recorded in the recording medium together with the image data. A playback apparatus reads from the recording medium the compression ratio data together with the image data undergone the compression coding so as to decode the image data by use of the compression ratio data. In consequence, according to these apparatuses, the compression ratio can be arbitrarily set. In addition, the image signal recording apparatus generates recording codes associated with the amounts of the image data and the audio data so as to write the codes in the recording medium. The recording codes are read from the recording medium, so that the remaining amount of the recording medium available for the recording operation is displayed.

摘要翻译： 图像信号记录装置对图像数据进行正交变换和压缩编码，以将结果数据记录在记录介质中。 设置选择器来选择数据的压缩编码的压缩比，即压缩比是可选择的。 选择的压缩比数据与图像数据一起被记录在记录介质中。 回放装置从记录介质读取压缩比数据以及经过压缩编码的图像数据，以便通过使用压缩比数据解码图像数据。 因此，根据这些装置，压缩比可以任意设定。 此外，图像信号记录装置产生与图像数据和音频数据的量相关联的记录代码，以便将代码写入记录介质。 从记录介质读取记录代码，从而显示可用于记录操作的记录介质的剩余量。

公开(公告)号：US5428389A

公开(公告)日：1995-06-27

申请号：US104928

申请日：1993-08-12

申请人： Kenji Ito ,  Kaoru Adachi ,  Osamu Saito

发明人： Kenji Ito ,  Kaoru Adachi ,  Osamu Saito

IPC分类号： G11C7/10 ,  H04N1/21 ,  H04N7/30 ,  H04N5/76 ,  H04N9/64

CPC分类号： H04N1/2137 ,  G11C7/1027 ,  H04N1/2112 ,  H04N1/2158 ,  H04N19/60

摘要： An image data storage/processing apparatus is provided, which is particularly applicable to an electronic still camera, for example. The image data storage apparatus uses a dynamic RAM as a frame memory for temporarily storing image data representative of a field of an image to be recorded. The frame memory includes at least first and second memories. In the apparatus, there is provided a control so that the image data corresponding to the adjacent two pixel lines on the field are continuously read out in such a manner that they are simultaneously read out from the first and second memories, and the image data corresponding to one of the two pixel lines are read out with delay by the time required for reading out of the image data corresponding to the other pixel line. The image signal processing apparatus is capable of performing processing for writing in and reading out of various types of image data with a single memory.

摘要翻译： 提供了一种特别适用于电子静态照相机的图像数据存储/处理装置。 图像数据存储装置使用动态RAM作为帧存储器，用于临时存储表示要记录的图像的场的图像数据。 帧存储器至少包括第一和第二存储器。 在该装置中，提供了一种控制，使得对应于场上的相邻两个像素线的图像数据以从第一和第二存储器同时读出的方式连续地读出，并且图像数据对应 到两个像素线中的一个被延迟地读出对应于另一个像素线的图像数据所需的时间。 图像信号处理装置能够执行用单个存储器写入和读出各种图像数据的处理。

公开(公告)号：US5584044A

公开(公告)日：1996-12-10

申请号：US465619

申请日：1995-06-05

申请人： Kouichi Gouhara ,  Kaoru Adachi ,  Kenji Ito ,  Osamu Saito

发明人： Kouichi Gouhara ,  Kaoru Adachi ,  Kenji Ito ,  Osamu Saito

IPC分类号： G06F12/06 ,  G06F12/00

CPC分类号： G06F12/0623

摘要： An IC memory card for storing picture data, character data or similar data. The memory card has an input/output section connectable to a host, a storage implemented by a semiconductor memory, and a controller for writing or reading data out of the storage. The input/output section has a data terminal for receiving an address signal and a data signal each being made up of a plurality of blocks continuously, an address/data discrimination terminal for receiving a bilevel signal for discriminating the address signal and data signal fed to the data terminal from each other, a read/write discrimination terminal for receiving a bilevel signal for discriminating the read-out and write-in of data from each other, and a bus clock input terminal for receiving a bus clock synchronous to each block of the address signal or each block of the data signal.

摘要翻译： 一种用于存储图像数据，字符数据或类似数据的IC存储卡。 存储卡具有可连接到主机的输入/输出部分，由半导体存储器实现的存储器以及用于将数据写入或读出存储器的控制器。 输入/输出部分具有数据端子，用于连续地接收地址信号和数据信号，每个数据信号由多个块组成，地址/数据鉴别终端用于接收用于识别地址信号的二级信号和馈送到 数据终端，用于接收用于识别数据的读出和写入的二级信号的读/写鉴别终端，以及用于接收与每个块同步的总线时钟的总线时钟输入端 地址信号或数据信号的每个块。

公开(公告)号：US4982282A

公开(公告)日：1991-01-01

申请号：US444282

申请日：1989-12-01

申请人： Osamu Saito ,  Kenji Ito

发明人： Osamu Saito ,  Kenji Ito

IPC分类号： G06T9/00 ,  H04N1/41 ,  H04N1/415 ,  H04N7/26

CPC分类号： H04N19/00 ,  H04N19/126 ,  H04N19/136 ,  H04N19/18 ,  H04N19/46 ,  H04N19/60 ,  H04N19/124 ,  H04N19/13 ,  H04N19/146 ,  H04N19/91

摘要： A compression encoder uses an arbitrary normalization coefficient and a preset table to achieve a compression of image signal with a desired compression rate. Since the normalization coefficient and the table data are sent to an image signal decoding and reproducing apparatus together with the compressed image data, the reproducing apparatus can restore the original image from those data items. Furthermore, in the encoder, when an amplitude value of the data exceeds a predetermined value, an overflow sensor means the condition so as to produce normalized data in addition to the Huffman-encoded data. The reproducing apparatus achieves the image signal decoding and reproducing operations by use of the normalized data and the Huffman-encoded data. With these apparatuses, the picture quality can be prevented from being lowered due to an overflow in the encoding operation.

摘要翻译： 压缩编码器使用任意归一化系数和预设表来实现具有期望压缩率的图像信号的压缩。 由于归一化系数和表数据与压缩图像数据一起发送到图像信号解码和再现装置，所以再现装置可以从这些数据项恢复原始图像。 此外，在编码器中，当数据的振幅值超过预定值时，溢出传感器意味着除霍夫曼编码数据之外还产生归一化数据的条件。 再现装置通过使用归一化数据和霍夫曼编码数据来实现图像信号解码和再现操作。 利用这些装置，可以防止图像质量由于编码操作中的溢出而降低。