专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US06539512B1 Interleaving method and circuit for high density recording medium 有权
标题翻译：高密度记录介质的交错方法和电路
公开(公告)号：US06539512B1
公开(公告)日：2003-03-25
申请号：US09366755
申请日：1999-08-04
申请人： Jong-sik Jeong , Yoon-woo Lee , Gyu-hwan Jung
发明人： Jong-sik Jeong , Yoon-woo Lee , Gyu-hwan Jung
IPC分类号： H03M1300
CPC分类号： G11B20/12 , G11B20/10 , G11B2020/10972 , G11B2020/1287
摘要： An interleaving method for a high density recording medium and an interleaving circuit therefor. In this circuit, an intrablock interleaver interleaves received data having a predetermined error correction code within an error correction block to output intrablock-interleaved data. An interblock interleaver interleaves the intrablock-interleaved data between the error correction blocks in units of a predetermined number of the error correction blocks to output interblock-interleaved data. Accordingly, the capability of correcting a burst error due to a scratch on a disc is improved while maintaining compatibility with a general DVD format in an error correction format. Also, each row having position information is not interleaved while interblock interleaving is performed, so that a similar access time to the access time in a DVD is achieved. Therefore, high-speed searching is possible.
摘要翻译：一种用于高密度记录介质的交织方法及其交织电路。在该电路中，块内交织器在纠错块内交织具有预定纠错码的接收数据，以输出块内交错数据。帧间交织器以预定数量的纠错块为单位对纠错块之间的块内交织数据进行交织，以输出块间交错数据。因此，改善了由于盘上划痕引起的突发错误的能力，同时保持与纠错格式的一般DVD格式的兼容性。此外，在执行帧间交织的同时，具有位置信息的每一行都不进行交织，从而实现与DVD中的访问时间相似的访问时间。因此，可以进行高速搜索。

2. 发明授权

US5598213A Transmission bit-rate controlling apparatus for high efficiency coding of moving picture signal 失效
标题翻译：用于运动图像信号的高效率编码的传输比特率控制装置
公开(公告)号：US5598213A
公开(公告)日：1997-01-28
申请号：US404064
申请日：1995-03-14
申请人： Tae-yun Chung , Gyu-hwan Jung
发明人： Tae-yun Chung , Gyu-hwan Jung
IPC分类号： H04N19/60 , G06T9/00 , H03M7/40 , H04N19/115 , H04N19/126 , H04N19/134 , H04N19/136 , H04N19/137 , H04N19/14 , H04N19/147 , H04N19/152 , H04N19/174 , H04N19/176 , H04N19/196 , H04N19/423 , H04N19/503 , H04N19/61 , H04N19/625 , H04N19/85 , H04N19/91 , H04N7/36
CPC分类号： H04N19/14 , H04N19/126 , H04N19/176 , H04N19/60 , H04N19/146 , H04N19/152
摘要： In an encoder having a data formatter, a DCT circuit, a transmission rate controlling apparatus, a quantizer, a variable-length coder and an encoder buffer, for compressing a moving picture signal, the transmission rate controlling apparatus includes a segment complexity estimator for receiving outputs of the quantizer and variable-length coder and estimating the complexity of a segment of a current frame relative to a previous frame, a rate control adjustment coefficient calculator for receiving the output of the segment complexity estimator and calculating a rate control adjustment coefficient, a reference quantization coefficient calculator for receiving the rate control adjustment coefficient and the output of the encoder buffer and calculating a reference quantization coefficient, and an activity calculator for receiving the output of the data formatter, calculating activity by a macroblock unit, performing an operation on the calculated activity using the output of the reference quantization coefficient calculator and outputting a quantization coefficient.
摘要翻译：在具有用于压缩运动图像信号的数据格式化器，DCT电路，传输速率控制装置，量化器，可变长度编码器和编码器缓冲器的编码器中，传输速率控制装置包括：段复用度估计器，用于接收量化器和可变长度编码器的输出，并估计当前帧相对于先前帧的段的复杂度;速率控制调整系数计算器，用于接收段复杂度估计器的输出并计算速率控制调整系数; 参考量化系数计算器，用于接收速率控制调节系数和编码器缓冲器的输出并计算参考量化系数;以及活动计算器，用于接收数据格式器的输出，通过宏块单元计算活动，对使用参考的输出计算活动量化系数计算器并输出量化系数。

3. 发明授权

US5699119A Quantization method and circuit therefor 失效
标题翻译：量化方法及其电路
公开(公告)号：US5699119A
公开(公告)日：1997-12-16
申请号：US413831
申请日：1995-03-30
申请人： Tae-yun Chung , Gyu-hwan Jung
发明人： Tae-yun Chung , Gyu-hwan Jung
IPC分类号： H04N19/60 , G06T9/00 , H04B14/06 , H04N1/41 , H04N19/119 , H04N19/126 , H04N19/136 , H04N19/176 , H04N19/186 , H04N19/189 , H04N19/196 , H04N19/423 , H04N19/59 , H04N19/625 , H04N19/85 , H04N7/32
CPC分类号： H04N19/18 , H04N19/105 , H04N19/112 , H04N19/115 , H04N19/126 , H04N19/137 , H04N19/14 , H04N19/172 , H04N19/176 , H04N19/61 , H04N19/13 , H04N19/146 , H04N19/152 , H04N19/91
摘要： In a method for quantizing a moving picture signal and a circuit therefor, the method includes the steps of calculating horizontal and vertical gradients of first pixel values in a macroblock, determining each maximum value of the horizontal and vertical gradients, classifying the moving picture signal into complexity class if the maximum value is greater than a first threshold value and into edge class if the maximum value is greater than a second threshold value and is less than a third threshold value, calculating an activity value with respect to the first pixel values in the macroblock by calculating the sum of absolute values of DCT coefficients for four blocks in the macroblock, calculating an activity normalization coefficient, using the activity value of the macroblock and an average activity value of all pixels of the same picture type; and calculating a reference quantization step size produced by a backward rate control through a forward estimation considering coding efficiency and a visual characteristic which depends on the class of the moving picture signal and the energy of DCT coefficients. Therefore, a high efficiency and high picture quality moving picture compressor can be implemented.
摘要翻译：在用于量化运动图像信号及其电路的方法中，该方法包括以下步骤：计算宏块中的第一像素值的水平和垂直梯度，确定水平和垂直梯度的每个最大值，将运动图像信号分类为如果最大值大于第一阈值并且如果最大值大于第二阈值并且小于第二阈值并且小于第三阈值，则计算相对于第一阈值中的第一像素值的活动值宏块，通过计算宏块中四个块的DCT系数的绝对值之和，使用宏块的活动值和相同图像类型的所有像素的平均活动值来计算活动归一化系数; 并且通过考虑编码效率的前向估计和依赖于运动图像信号的类别和DCT系数的能量的视觉特性来计算由后向速率控制产生的参考量化步长。因此，可以实现高效率和高画质的动态图像压缩器。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式