公开(公告)号：US5301032A

公开(公告)日：1994-04-05

申请号：US986061

申请日：1992-12-04

申请人： Min-suk Hong ,  Yong-kyu Kim ,  Ku-man Park

发明人： Min-suk Hong ,  Yong-kyu Kim ,  Ku-man Park

IPC分类号： G11B20/12 ,  G06T9/00 ,  H03M7/30 ,  H04N5/92 ,  H04N19/102 ,  H04N19/115 ,  H04N19/126 ,  H04N19/134 ,  H04N19/136 ,  H04N19/14 ,  H04N19/142 ,  H04N19/146 ,  H04N19/169 ,  H04N19/172 ,  H04N19/174 ,  H04N19/176 ,  H04N19/189 ,  H04N19/196 ,  H04N19/423 ,  H04N19/46 ,  H04N19/503 ,  H04N19/51 ,  H04N19/59 ,  H04N19/60 ,  H04N19/61 ,  H04N19/625 ,  H04N19/70 ,  H04N19/85 ,  H04N19/89 ,  H04N19/91 ,  H04N1/415

CPC分类号： H04N19/179 ,  H04N19/105 ,  H04N19/126 ,  H04N19/14 ,  H04N19/147 ,  H04N19/172 ,  H04N19/176 ,  H04N19/18 ,  H04N19/37 ,  H04N19/60 ,  H04N19/61 ,  H04N19/13 ,  H04N19/146 ,  H04N19/149 ,  H04N19/15 ,  H04N19/91

摘要： Disclosed is a digital image compression and decompression method and apparatus for dividing a supplied digital image signal into blocks of predetermined size, performing variable-length coding of the signal, separating the signal with respect to principle information and remaining information, and controlling the record format so that each type of information is alternately recorded on a recording medium in an equal interval whenever recording the compressed information and decompressing the information, according to the reverse order, during decoding. Also, the function for extracting an activity in two steps during coding and then controlling the permitted number of bits of the variable length coding is provided. Accordingly, the coding efficiency is improved and the circuitry is simplified so that the price of the end product can be lowered.

摘要翻译： 公开了一种用于将所提供的数字图像信号划分成预定大小的块的数字图像压缩和解压缩方法和装置，对信号进行可变长度编码，将信号相对于原理信息和剩余信息分离，并且控制记录格式 使得每个类型的信息在解码期间每当记录压缩信息并按照相反的顺序解压缩信息时，以相等的间隔被交替地记录在记录介质上。 此外，提供了在编码期间以两步提取活动然后控制可变长度编码的允许位数的功能。 因此，编码效率提高，电路简化，可以降低最终产品的价格。

公开(公告)号：US5587805A

公开(公告)日：1996-12-24

申请号：US158827

申请日：1993-11-29

申请人： Ku-man Park

发明人： Ku-man Park

IPC分类号： G11B20/12 ,  H04N5/7826 ,  H04N5/783 ,  H04N5/92 ,  H04N5/926 ,  H04N5/782

CPC分类号： H04N5/9264 ,  H04N5/783

摘要： A method for recording images in a digital video cassette recorder, which utilizes high compressibility, and which is advantageous in an interframe coding method, includes steps for regularly and repeatedly recording low-frequency data of an intraframe corresponding to the outline of a picture in a group of pictures (GOP) unit and providing remaining data recording area in an end area of each GOP unit to permit data quantity fixation and in order to perform trick play operations. Furthermore, the method orders sub-images of a picture regularly or irregularly while recording the low-frequency data of all the sub-images which belong to a same cluster in low-frequency data recording area of each sub-image, to thereby raise picture quality during trick play.

摘要翻译： 一种在数字录像机中记录图像的方法，其利用高可压缩性，并且在帧间编码方法中是有利的，包括以下步骤：定期和重复地记录与图像轮廓对应的帧内的低频数据 图像组（GOP）单元，并且在每个GOP单元的结束区域中提供剩余数据记录区域，以允许数据量固定和执行特技播放操作。 此外，该方法在每个子图像的低频数据记录区域中记录属于同一簇的所有子图像的低频数据时，定期或不规则地排序图像的子图像，从而提高图像 特技玩的质量。

公开(公告)号：US5335117A

公开(公告)日：1994-08-02

申请号：US971062

申请日：1992-11-03

申请人： Ku-man Park ,  Tae-eung Kim

发明人： Ku-man Park ,  Tae-eung Kim

IPC分类号： G11B5/02 ,  G11B5/008 ,  G11B15/18 ,  G11B20/12 ,  G11B20/18 ,  G11B27/00 ,  G11B27/30 ,  H04N5/783 ,  H04N9/804 ,  H04N9/888 ,  G11B5/09 ,  H04N5/76

CPC分类号： H04N9/8047 ,  G11B15/1875 ,  G11B20/1208 ,  G11B20/1809 ,  G11B27/005 ,  G11B27/3027 ,  G11B27/3081 ,  G11B5/0086 ,  H04N9/888 ,  G11B2220/90 ,  H04N5/783

摘要： A method for digital magnetic recording and reproducing of video images while compressively encoding video image data to reduce a bit rate includes the steps of forming the compressed data into sync-block units corresponding to minimum units for error-correcting, recording the compressed data as sync block units on a plurality of tracks of a digital magnetic tape, and reproducing a recognizable image corresponding to the video image data from the recorded compressed data. According to one aspect of the method, the sync blocks are arranged so as to be recorded on the plurality of tracks using a line sequential scanning method in the track-traversing direction, and the arranged sync blocks are restored to their original locations during reproduction. A digital magnetic recording and reproducing apparatus suitable for implementing the above method is also disclosed.

摘要翻译： 一种用于数字磁记录和再现视频图像的方法，同时压缩编码视频图像数据以降低比特率包括以下步骤：将压缩数据形成为对应于用于纠错的最小单位的同步块单元，将压缩数据记录为同步 在数字磁带的多个轨道上的块单元，并且从记录的压缩数据再现与视频图像数据相对应的可识别图像。 根据该方法的一个方面，同步块被布置为使用轨道横越方向上的行顺序扫描方法记录在多个轨道上，并且在再现期间将排列的同步块恢复到其原始位置。 还公开了适用于实现上述方法的数字磁记录和再现装置。

公开(公告)号：US5323187A

公开(公告)日：1994-06-21

申请号：US956352

申请日：1992-10-05

申请人： Ku-man Park

发明人： Ku-man Park

IPC分类号： H03M7/30 ,  G06T9/00 ,  H04N1/41 ,  H04N19/115 ,  H04N19/126 ,  H04N19/132 ,  H04N19/134 ,  H04N19/136 ,  H04N19/14 ,  H04N19/149 ,  H04N19/176 ,  H04N19/186 ,  H04N19/189 ,  H04N19/192 ,  H04N19/196 ,  H04N19/59 ,  H04N19/60 ,  H04N19/625 ,  H04N19/80 ,  H04N19/85 ,  H04N19/91 ,  H04N7/130

CPC分类号： H04N19/192 ,  H04N19/115 ,  H04N19/126 ,  H04N19/14 ,  H04N19/149 ,  H04N19/154 ,  H04N19/176 ,  H04N19/18 ,  H04N19/182 ,  H04N19/184 ,  H04N19/186 ,  H04N19/196 ,  H04N19/197 ,  H04N19/60 ,  H04N19/124 ,  H04N19/146

摘要： An image compression system using the setting of fixed bit rates for compressing an image wherein image blocks are sorted into classes in accordance with the activities of the blocks, the activities being obtained by dividing an original image by a predetermined unit. Individual scale factors are given for each block, so that coding is carried out by fixing the allocating amount of bits to blocks to be coded. The system is operated by a method which detects activities according to a visual characteristic for each predetermined block unit, classifies blocks into corresponding classes based on the detected activities, sets a quantization scale factor corresponding to a sorted class by the average activity of the activities, controls the quantization by determining a quantization stepsize according to a predetermined value of a quantization table and a quantization scale factor, determines the pertinence of bit number of the quantized coefficient with respect to an allocated bit number per block, and repeatedly adjusts the block bit number to be output to carry out entropy coding. Thus, the quality of an image can be stabilized.

摘要翻译： 一种使用固定比特率的设置来压缩图像的图像压缩系统，其中根据块的活动将图像块分类成类别，通过将原始图像除以预定单位获得的活动。 给出每个块的各个比例因子，从而通过将比特的分配量固定到要编码的块来进行编码。 该系统通过根据每个预定块单元的视觉特性检测活动的方法来操作，基于检测到的活动将块分类为相应类别，通过活动的平均活动来设置与排序类别相对应的量化比例因子， 通过根据量化表的预定值和量化比例因子确定量化步长来控制量化，确定量化系数的比特数相对于每个块的分配比特数的相关性，并重复地调整块比特数 输出以执行熵编码。 因此，图像的质量可以稳定。