会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 1. 发明授权
    • Picture data compression coding device and method thereof
    • 图像数据压缩编码装置及其方法
    • US6111987A
    • 2000-08-29
    • US947464
    • 1997-10-09
    • Mikio WatanabeKenji ItoKenji Moronaga
    • Mikio WatanabeKenji ItoKenji Moronaga
    • H03M7/30G06T9/00H04N1/41H04N1/415H04N19/102H04N19/115H04N19/126H04N19/132H04N19/134H04N19/136H04N19/14H04N19/146H04N19/149H04N19/172H04N19/176H04N19/186H04N19/189H04N19/194H04N19/196H04N19/423H04N19/60H04N19/625H04N19/85H04N19/91H04N19/93G06K9/46
    • G06T9/007
    • 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.
    • 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。
    • 3. 发明授权
    • Picture data compression coding device and method thereof
    • 图像数据压缩编码装置及其方法
    • US5732156A
    • 1998-03-24
    • US396894
    • 1995-03-01
    • Mikio WatanabeKenji ItoKenji Moronaga
    • Mikio WatanabeKenji ItoKenji Moronaga
    • H03M7/30G06T9/00H04N1/41H04N1/415H04N19/102H04N19/115H04N19/126H04N19/132H04N19/134H04N19/136H04N19/14H04N19/146H04N19/149H04N19/172H04N19/176H04N19/186H04N19/189H04N19/194H04N19/196H04N19/423H04N19/60H04N19/625H04N19/85H04N19/91H04N19/93G06K9/46
    • G06T9/007
    • 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.
    • 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。
    • 6. 发明授权
    • Device for coding a picture signal by compression
    • 用于通过压缩编码图像信号的装置
    • US5101280A
    • 1992-03-31
    • US524389
    • 1990-05-17
    • Kenji MoronagaKenji ItoMikio Watanabe
    • Kenji MoronagaKenji ItoMikio Watanabe
    • H04N1/415G06T9/00
    • H04N19/18H04N19/126H04N19/14H04N19/149H04N19/176H04N19/60H04N19/124H04N19/146H04N19/152
    • 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.
    • 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。
    • 7. 发明授权
    • Image signal recording apparatus capable of recording compressed image
data together with audio data
    • 能够将压缩图像数据与音频数据一起记录的图像信号记录装置
    • US5032927A
    • 1991-07-16
    • US317517
    • 1989-03-01
    • Mikio WatanabeKenji ItoSeiki Nishi
    • Mikio WatanabeKenji ItoSeiki Nishi
    • G11B27/34H04N1/21H04N5/77H04N5/926
    • H04N1/32128G11B27/34H04N5/772H04N5/9264H04N5/9267H04N2201/212H04N2201/3225H04N2201/3264H04N2201/3277
    • 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.
    • 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。