公开(公告)号：US07065291B2

公开(公告)日：2006-06-20

申请号：US09784630

申请日：2001-02-15

申请人： Hiroyuki Sano ,  Kiminori Sugisaki ,  Hiroyuki Tominaga

发明人： Hiroyuki Sano ,  Kiminori Sugisaki ,  Hiroyuki Tominaga

IPC分类号： G11B5/00 ,  H04N7/26 ,  H04N5/781

CPC分类号： H04N5/781 ,  H04L12/66 ,  H04N7/52 ,  H04N21/23608 ,  H04N21/4307 ,  H04N21/4344 ,  H04N21/43632

摘要： In a video recording/playback apparatus, when recording a series of packets transmitted over an IEEE 1394 bus, a relative value is taken between a requested time of arrival written in a header portion and a cycle time at the time of reception, and then the requested time of arrival is replaced with the relative value. When playing back the series of packets, the relative value is added to a cycle time at the time of transmission, and the relative value is replaced by the obtained value which will be used as a requested time of arrival for playback.

摘要翻译： 在视频记录/重放装置中，当记录通过IEEE 1394总线发送的一系列分组时，在写入报头部分的请求到达时间和接收时的周期时间之间取相对值， 要求的到达时间被替换为相对值。 当回放一系列数据包时，将相对值添加到发送时的周期时间，并将相对值替换为将被用作回放所请求到达时间的获得值。

公开(公告)号：US06674897B1

公开(公告)日：2004-01-06

申请号：US08929747

申请日：1997-09-15

申请人： Kiminori Sugisaki ,  Jason Fischl ,  Nobuaki Izumi ,  Naofumi Yanagihara ,  Yuka Kiyama

发明人： Kiminori Sugisaki ,  Jason Fischl ,  Nobuaki Izumi ,  Naofumi Yanagihara ,  Yuka Kiyama

IPC分类号： G06K900

CPC分类号： H04N11/044 ,  H04N9/8047 ,  H04N19/122 ,  H04N19/126 ,  H04N19/137 ,  H04N19/14 ,  H04N19/149 ,  H04N19/176 ,  H04N19/18 ,  H04N19/186 ,  H04N19/88

摘要： A picture data compressing device has picture data divided by a blocking circuit 1 in to a plurality of blocks, each block consisting of a pre-set number of pixels and shuffled by a shuffling circuit 2. The blocked and shuffled data is transformed by a DCT circuit 3 into data in the frequency domain and re-quantized by a quantization circuit 4, thereby compressing the picture data. A red detector 6 determines whether a block from the shuffling circuit 2 is the red-based block. If the red detector 6 detects a red-based block, a controller 7 controls the quantization circuit 4 so that the quantization step of the quantization circuit 4 will become finer. Thus, the data of the red-based block susceptible to block distortion may be quantized with a finer quantization step for improving reproduction and alleviating block distortion.

摘要翻译： 图像数据压缩装置具有由阻塞电路1分割成多个块的图像数据，每个块由预定数量的像素组成并由混洗电路2进行混洗。阻塞和混洗数据被DCT变换 电路3转换成频域的数据并由量化电路4重新量化，由此压缩图像数据。 红色检测器6确定来自混洗电路2的块是否是基于红色的块。 如果红色检测器6检测到基于红色的块，则控制器7控制量化电路4，使得量化电路4的量化步长变得更细。 因此，可以通过更精细的量化步长来量化易受块失真的红色块的数据，以改善再现并减轻块失真。

公开(公告)号：US5535275A

公开(公告)日：1996-07-09

申请号：US263423

申请日：1994-06-21

申请人： Kiminori Sugisaki ,  Keiji Kanota

发明人： Kiminori Sugisaki ,  Keiji Kanota

IPC分类号： H04K1/04 ,  G06F21/10 ,  H04L9/18 ,  H04N5/765 ,  H04N5/913 ,  H04N5/92 ,  H04N7/167 ,  H04N7/169 ,  H04N9/804 ,  H04N9/808 ,  H04N19/467 ,  H04N19/60 ,  H04N19/625 ,  H04N19/65 ,  H04N19/70 ,  H04N19/85 ,  H04N19/88 ,  H04N21/433 ,  H04N21/4408 ,  H04N21/8355 ,  H04L9/34

CPC分类号： H04N5/913 ,  H04N9/8047 ,  H04N2005/91364

摘要： Unauthorized copying of a video signal is prevented by means of a compression encoding circuit that selectively applies scrambling to the encoded signal. The compression encoding circuit is of the type which divides frames of a digital video signal into rectangular data blocks, aggregates a predetermined number of data blocks to form macroblocks, shuffles the macroblocks within the video frame, and performs discrete cosine transform processing block-by-block on the rectangular data blocks making up the shuffled macroblocks. The scrambling may be accomplished by rearranging the order of the rectangular data blocks within each macroblock, or by changing the pattern according to which macroblocks are shuffled in the video frames. The scrambling may also be accomplished by interchanging bits in a component, such as the DC component, of the DCT-processed data, or by setting such data bits to predetermined values. A compression encoding circuit with the above-described scrambling capability may be used in a digital video tape recorder (VTR), and the scrambling capability may be activated in response to a copyright protection signal present in an analog video signal supplied as an input to the digital VTR.

摘要翻译： 通过压缩编码电路来防止视频信号的未经授权的复制，该压缩编码电路有选择地对加密信号进行加扰。 压缩编码电路是将数字视频信号的帧分割为矩形数据块的类型，聚集预定数量的数据块以形成宏块，对视频帧内的宏块进行混洗，并逐个进行离散余弦变换处理， 阻止构成洗牌宏块的矩形数据块。 可以通过重新排列每个宏块内的矩形数据块的顺序，或通过根据哪些宏块在视频帧中进行混洗来改变模式来实现加扰。 也可以通过将DCT处理的数据的诸如DC分量的分量中的比特进行交换，或者将这些数据比特设置为预定值来实现加扰。 具有上述加扰能力的压缩编码电路可以用在数字录像机（VTR）中，并且可以响应于作为输入的模拟视频信号中存在的版权保护信号来激活加扰能力 数字VTR。