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公开(公告)号：US06256347B1
公开(公告)日：2001-07-03
申请号：US08911525
申请日：1997-08-12
IPC分类号： H04N712
CPC分类号： H04N19/98 , H04N19/423 , H04N19/593 , H04N19/61
摘要： A memory efficient image processor receives DPCM prediction error values from decompressed MPEG coded digital video signals in the form of pixel blocks containing luminance and chrominance data in a 4:2:2 or 4:2:0 format and recompresses the pixel blocks to a predetermined resolution. Luminance and chrominance data are processed with different compression laws during recompression. Luminance data are recompressed to an average of six bits per pixel, and only a reference pixel and one other pixel are processed separately from all other luminance pixels in a block. Chrominance data are recompressed to an average of four bits per pixel. Each pixel block is stored with overhead information facilitating efficient and accurate reconstruction. Accurate pixel reconstruction is facilitated by processing a reference pixel accurately; scaling the pixel block; employing quantization tables which are symmetrical and fitted to the domain of the pixel block; biasing negative prediction error values to positive values; using short codewords in quantization tables at levels which are most likely to occur statistically; and processing each pixel with three, four or five bit quantization to ensure maximum resolution and an overall four-bit average for the pixel block.
摘要翻译： 存储器高效图像处理器以4：2：2或4：2：0格式从包含亮度和色度数据的像素块的形式的解压缩MPEG编码数字视频信号接收DPCM预测误差值，并将像素块重新压缩到预定的 解析度。 亮度和色度数据在重新压缩时用不同的压缩规律进行处理。 亮度数据被重新压缩为每像素平均6位，并且仅一个参考像素和另一个像素与块中的所有其它亮度像素分开处理。 色度数据被重新压缩到平均每像素4位。 每个像素块存储有开销信息，有助于高效和准确的重建。 通过精确处理参考像素来促进准确的像素重建; 缩放像素块; 使用对称并适合于像素块的域的量化表; 将负预测误差值偏置为正值; 在量化表中使用最可能在统计学上发生的级别的短码字; 并且使用三个，四个或五个位量化来处理每个像素，以确保像素块的最大分辨率和总体四位平均值。
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公开(公告)号：US06621934B1
公开(公告)日：2003-09-16
申请号：US08910709
申请日：1997-08-12
IPC分类号： G06K936
CPC分类号： H04N19/428 , H04N19/593
摘要： An image processor produces a DPCM prediction error to be quantized. If the prediction error value is positive, the value passes unchanged to a quantizer. If the prediction error value is negative, a bias value is added to the prediction error value to produce a positive number within the operating limits of the quantizer. Biased prediction error values are quantized. Because all values received by the quantizer are positive and within the current quantizer limits, the quantization table used by the quantizer need not include quantization values for negative prediction error values. This reduces the scope of prediction error values by a factor of two, doubling quantization resolution.
摘要翻译： 图像处理器产生要量化的DPCM预测误差。 如果预测误差值为正，则该值不改变为量化器。 如果预测误差值为负，则将偏置值加到预测误差值上，以在量化器的运行极限内产生正数。 偏置预测误差值被量化。 由于量化器接收的所有值都是正的并且在当前的量化器限制内，量化器使用的量化表不需要包括用于负预测误差值的量化值。 这将预测误差值的范围减小了2倍，使量化分辨率提高了一倍。
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3.发明授权公开(公告)号：US06529551B1
公开(公告)日：2003-03-04
申请号：US08911526
申请日：1997-08-12
IPC分类号： H04N718
CPC分类号： H04N19/428 , H04N19/13 , H04N19/423 , H04N19/593 , H04N19/60 , H04N19/61 , H04N19/91
摘要： An MPEG coded and compressed video signal is received and decompressed for display. Prior to storing frames required for motion compensation in memory, pixel blocks are recompressed into DPCM prediction error values to reduce bandwidth and frame memory requirements. Fixed length quantization and dequantization tables (FIG. 2) have N levels (e.g., 15 levels), and each level has an associated output symbol of predominantly M bits (e.g., 4 bits), except that at least one of said N levels (e.g., level 7) is defined by a unique short symbol having less than M bits (e.g., 3 bits), and input data for that level is received at a desired rate. Each time a short symbol is used to represent a data value, bandwidth and memory are reduced and/or preserved for other uses, for example, inserting overhead data into a fixed-size data stream. For large sequences of data, such as exists for video data for example, the reduction in memory and bandwidth is significant.
摘要翻译： MPEG编码和压缩视频信号被接收和解压缩以供显示。 在将运动补偿所需的帧存储在存储器中之前，将像素块重新压缩为DPCM预测误差值，以减少带宽和帧存储器要求。 固定长度量化和反量化表（图2）具有N个电平（例如，15个电平），并且每个电平具有主要为M位（例如，4位）的相关联的输出符号，除了至少一个所述N个电平 例如，级7）由具有小于M位（例如，3位）的唯一短符号定义，并且以期望的速率接收该电平的输入数据。 每当使用短符号来表示数据值时，减少和/或保留带宽和/或存储用于其他用途，例如将开销数据插入到固定大小的数据流中。 对于诸如存在视频数据的大数据序列，存储器和带宽的减少是显着的。
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4.发明授权
公开(公告)号：US6167086A
公开(公告)日：2000-12-26
申请号：US908116
申请日：1997-08-12
CPC分类号： H04N19/98 , H04N19/40 , H04N19/423 , H04N19/428 , H04N19/61
摘要： In an MPEG compatible image signal processor an MPEG data stream is decoded, decompressed and recompressed before blocks of image pixel values are stored in memory. The recompression system evaluates block data to determine the range and minimum pixel values for a given image block of pixels values. These values are encoded, and the encoded representations are stored in a parameter field with the quantized data block to facilitate data reconstruction. Encoding occurs by fitting the actual range and minimum values to a predetermined set of values. Each selected predetermined value is then encoded as a three-bit index in the parameter field. Storing the encoded values with the quantized data facilitates reconstruction with minimal error. Also, encoding the values preserves memory for the quantized data.
摘要翻译： 在MPEG兼容图像信号处理器中，MPEG数据流在图像像素值的块被存储在存储器中之前被解码，解压缩和再压缩。 重新压缩系统评估块数据以确定给定图像块的像素值的范围和最小像素值。 这些值被编码，编码表示被存储在具有量化数据块的参数字段中，以便于数据重构。 通过将实际范围和最小值拟合到预定值的集合来进行编码。 然后将每个所选择的预定值编码为参数字段中的三位索引。 使用量化数据存储编码值有助于以最小错误进行重建。 此外，编码值可以保留量化数据的存储器。
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5.发明授权
公开(公告)号：US5818530A
公开(公告)日：1998-10-06
申请号：US666773
申请日：1996-06-19
IPC分类号： H04N7/30 , G06T1/60 , G06T9/00 , G09G5/39 , H04N5/44 , H04N5/46 , H04N7/26 , H04N7/32 , H04N7/46 , H04N7/50 , H04N7/12 , H04N11/02
CPC分类号： G06T1/60 , H04N19/105 , H04N19/136 , H04N19/182 , H04N19/423 , H04N19/428 , H04N19/59 , H04N19/61 , H04N5/46 , H04N5/4401
摘要： A television receiver with an MPEG decoder is configurable for full high definition decoding and display, or reduced cost lower definition display. The MPEG decoder (10-33) uses a controllable dual-mode data reduction network selectively employing horizontal detail reduction (29) and data re-compression (30) between the decoder and the decoder frame memory (20) from which image information to be displayed (27) is derived. The amount of data reduction is manufacturer selected in accordance with the resolution of the display device, e.g., equal to or less than high definition resolution. The frame memory size is also manufacturer selected in accordance with the resolution of the display device.
摘要翻译： 具有MPEG解码器的电视接收机可配置用于全高清解码和显示，或降低成本低清晰度显示。 MPEG解码器（10-33）使用可选的双模式数据缩减网络，其选择性地在解码器和解码器帧存储器（20）之间采用水平细节减少（29）和数据重新压缩（30），图像信息将从 显示（27）被导出。 根据显示装置的分辨率，例如等于或小于高分辨率的分辨率来选择制造商的数据量减少量。 帧存储器大小也是根据显示设备的分辨率选择的制造商。
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6.发明授权MPEG system which decompresses and recompresses image data before storing image data in a memory and in accordance with a resolution of a display device 失效MPEG系统，其在将图像数据存储在存储器中并根据显示设备的分辨率之前对图像数据进行解压缩和再压缩
公开(公告)号：US5825424A
公开(公告)日：1998-10-20
申请号：US666774
申请日：1996-06-19
CPC分类号： G06T3/4084 , H04N19/423 , H04N19/428 , H04N19/61
摘要： A television receiver with an MPEG decoder is configurable for full high definition decoding and display, or reduced cost lower definition display. The MPEG decoder (10-33) uses a controllable dual-mode data reduction network selectively employing horizontal detail reduction (29) and data re-compression (30) between the decoder and the decoder frame memory (20) from which image information to be displayed (27) is derived. The amount of data reduction is manufacturer selected in accordance with the resolution of the display device, e.g., equal to or less than high definition resolution. The frame memory size is also manufacturer selected in accordance with the resolution of the display device.
摘要翻译： 具有MPEG解码器的电视接收机可配置用于全高清解码和显示，或降低成本低清晰度显示。 MPEG解码器（10-33）使用可选的双模式数据缩减网络，其选择性地在解码器和解码器帧存储器（20）之间采用水平细节减少（29）和数据重新压缩（30），图像信息将从 显示（27）被导出。 根据显示装置的分辨率，例如等于或小于高分辨率的分辨率来选择制造商的数据量减少量。 帧存储器大小也是根据显示设备的分辨率选择的制造商。
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7.发明授权MPEG system which decompresses and then recompresses MPEG video data before storing said recompressed MPEG video data into memory 失效MPEG系统，在将所述再压缩的MPEG视频数据存储到存储器之前解压缩然后再压缩MPEG视频数据
公开(公告)号：US5847762A
公开(公告)日：1998-12-08
申请号：US579192
申请日：1995-12-27
CPC分类号： H04N19/428 , H04N19/423 , H04N19/61
摘要： An MPEG compatible decoder receives encoded, compressed data in the form of image representative pixel blocks. The decoder includes a frame memory (20) for storing reconstructed pixel blocks incident to the decoding process. The previously decompressed data is re-compressed (30) before being written to the memory. Stored decompressed data is decompressed for display (34, 26), or as needed for decoding functions such as motion compensation processing (32, 22). The compression performed before writing data to memory is block-based compression using compressed data from one of two different compression paths (FIG. 3, 314, 320) which compress a given pixel block simultaneously.
摘要翻译： MPEG兼容解码器以图像代表像素块的形式接收经编码的压缩数据。 解码器包括用于存储与解码处理相关的重构像素块的帧存储器（20）。 先前解压缩的数据在被写入存储器之前被重新压缩（30）。 存储的解压缩数据被解压缩以进行显示（34,26），或者根据需要解码功能，例如运动补偿处理（32,22）。 在将数据写入存储器之前执行的压缩是使用来自同时压缩给定像素块的两个不同压缩路径（图3,314,320）之一的压缩数据进行基于块的压缩。
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8.发明授权Apparatus and method for generating on-screen-display messages using stored bitstreams 失效使用存储的比特流生成屏幕显示消息的装置和方法
公开(公告)号：US6081300A
公开(公告)日：2000-06-27
申请号：US973035
申请日：1997-11-24
IPC分类号： H04N5/44 , H04N5/445 , H04N21/236 , H04N21/434 , H04N9/74
CPC分类号： H04N5/44508 , H04N21/42653 , H04N21/443 , H04N5/4401
摘要： An apparatus and concomitant method for constructing a valid OSD message bitstream from a plurality of stored character bitstreams. Each character of the OSD font set is initially scaled into a fixed block size, e.g., a block size of 16.times.16 pixels. Each character is then encoded into a "character bitstream" using the intra macroblock coding syntax. The character bitstream is stored within a storage medium. When a frame of OSD messages needs to be encoded, the character bitstreams are read from the storage medium and cascaded to form a valid OSD message bitstream which represents the frame of OSD messages.
摘要翻译： PCT No.PCT / US96 / 07127 Sec。 371日期：1997年11月24日 102（e）1997年11月24日PCT PCT 1996年5月17日PCT公布。 WO96 / 38007 PCT出版物 日期1996年11月28日一种用于从多个存储的字符比特流构造有效的OSD消息比特流的装置和并发方法。 OSD字体集的每个字符最初被缩放成固定块大小，例如16×16像素的块大小。 然后使用帧内宏块编码语法将每个字符编码成“字符比特流”。 字符比特流存储在存储介质中。 当需要对一帧OSD消息进行编码时，从存储介质读取字符比特流并级联以形成表示OSD消息帧的有效OSD消息比特流。
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公开(公告)号：US06873368B1
公开(公告)日：2005-03-29
申请号：US09555488
申请日：1997-12-23
CPC分类号： H04N21/440263 , H04N7/0112 , H04N19/117 , H04N19/42 , H04N19/59 , H04N19/61 , H04N19/85 , H04N21/234363
摘要： An adaptive digital image processor precedes an MPEG2 encoder. The processor receives a high definition video signal intended for broadcast or storage, and adaptively low-pass filters the signal. The signal is subjected to low-pass two-dimensional filtering to eliminate encoding artifacts and related noise. The video signal is then horizontally down-sampled to create a lower resolution hybrid signal. A receiver decodes and decompresses the hybrid signal. The hybrid signal is upsampled to its original resolution using existing hardware and software with a software modification.
摘要翻译： 自适应数字图像处理器位于MPEG2编码器之前。 处理器接收用于广播或存储的高分辨率视频信号，并且自适应地对信号进行低通滤波。 该信号经受低通二维滤波以消除编码伪像和相关噪声。 然后将视频信号水平下采样以产生较低分辨率的混合信号。 接收机解码和解压缩混合信号。 混合信号通过软件修改使用现有的硬件和软件上采样到其原始分辨率。
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公开(公告)号：US07800690B2
公开(公告)日：2010-09-21
申请号：US11014079
申请日：2004-12-15
IPC分类号： H04N7/01
CPC分类号： H04N21/440263 , H04N7/0112 , H04N19/117 , H04N19/42 , H04N19/59 , H04N19/61 , H04N19/85 , H04N21/234363
摘要： An adaptive digital image processor precedes an MPEG2 encoder. The processor receives a high definition video signal intended for broadcast or storage, and adaptively low-pass filters the signal. The signal is subjected to low-pass two-dimensional filtering to eliminate encoding artifacts and related noise. The video signal is then horizontally down-sampled to create a lower resolution hybrid signal. A receiver decodes and decompresses the hybrid signal. The hybrid signal is upsampled to its original resolution using existing hardware and software with a software modification.
摘要翻译： 自适应数字图像处理器位于MPEG2编码器之前。 处理器接收用于广播或存储的高分辨率视频信号，并且自适应地对信号进行低通滤波。 该信号经受低通二维滤波以消除编码伪像和相关噪声。 然后将视频信号水平下采样以产生较低分辨率的混合信号。 接收机解码和解压缩混合信号。 混合信号通过软件修改使用现有的硬件和软件上采样到其原始分辨率。
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