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    • 53. 发明授权
    • Communication jack nose cleaning tool
    • 通讯千斤顶清洁工具
    • US5543843A
    • 1996-08-06
    • US984416
    • 1993-04-19
    • Motoki KatoYoichi YagasakiJun Yonemitsu
    • Motoki KatoYoichi YagasakiJun Yonemitsu
    • H03M7/30G06T9/00H04N19/103H04N19/12H04N19/126H04N19/129H04N19/134H04N19/136H04N19/14H04N19/15H04N19/176H04N19/189H04N19/196H04N19/423H04N19/46H04N19/463H04N19/50H04N19/503H04N19/517H04N19/593H04N19/60H04N19/61H04N19/625H04N19/70H04N19/86H04N19/90H04N19/91H04N19/98H04N7/30
    • H04N19/98H04N19/12H04N19/527H04N19/593H04N19/61H04N19/86H04N19/30
    • In a method of compressing a motion picture signal divided into blocks of picture data and in which each of the blocks is selectively compressed by discrete cosine transform (DCT) coding or by intra-block predictive coding which effects non-transform coding (NTC); the intra-block predictive coding is effected by calculating a mean value of the picture data in a flat region of each block, determining a representation value of each block on the basis of the mean value thereof, determining the differences between the representation value for each block and the values of the pixels of picture data in the respective block, quantizing the resulting difference values with a selected quantizing width for generating quantizing coefficients, and variable length coding such quantizing coefficients for each block, the representation value of the respective block and the respective quantizing width. In decoding a bit stream of coded motion picture data, the bit stream is variable length decoded to generate the quantization coefficients for each block, the representation value determined on the basis of the mean value of a flat region in the respective block and information as to the quantizing width for the respective block, and then the generated quantization coefficients are decoded on the basis of the generated representation value and the information as to the quantizing width.
    • PCT No.PCT / JP92 / 00910 Sec。 371日期:1993年4月19日 102(e)日期1993年4月19日PCT提交1992年7月16日PCT公布。 出版物WO93 / 02528 日期:1993年2月4日在压缩分割成图像数据块的运动图像信号的方法中,通过离散余弦变换(DCT)编码或块内预测编码选择性地压缩各块, 编码(NTC); 通过计算每个块的平坦区域中的图像数据的平均值来实现块内预测编码,基于其平均值确定每个块的表示值,确定每个块的表示值之间的差异 块和相应块中的图像数据的像素的值,用用于产生量化系数的所选量化宽度量化所得到的差值,以及对每个块的可变长度编码这样的量化系数,各个块的表示值和 各量化宽度。 在对编码运动图像数据的比特流进行解码时,对比特流进行可变长度解码以产生每个块的量化系数,基于各个块中的平坦区域的平均值确定的表示值,以及关于 基于生成的表示值和关于量化宽度的信息,对各个块的量化宽度,然后生成的量化系数进行解码。
    • 54. 发明授权
    • Methods and devices for encoding and decoding frame signals and
recording medium therefor
    • 用于编码和解码帧信号的方法和装置及其记录介质
    • US5510840A
    • 1996-04-23
    • US441397
    • 1995-05-15
    • Jun YonemitsuYoichi Yagasaki
    • Jun YonemitsuYoichi Yagasaki
    • G06T9/00H04N7/26H04N7/46H04N7/50H04N7/54H04N9/804H04N21/236H04N21/434H04N7/24
    • H04N9/8047H04N19/00H04N19/105H04N19/112H04N19/137H04N19/577H04N19/61H04N21/236H04N21/434H04N7/54H04N19/70
    • A motion vector detection circuit detects the motion vector for each macro-block between an odd field and an even field. An encoding system decision circuit decides the type of the encoding system, that is if the encoding system is a field-based encoding system or a frame-based encoding system, based on a median of a motion vector. A control circuit controls gates and changeover switches, in accordance with the encoding system type as decided by the decision system, for generating a field-based reference picture or a frame-based reference picture from buffer memories. The circuitry from an additive node to a VLC circuit finds difference data between the reference picture and the picture to be encoded, while transforming the difference data by discrete cosine transform and variable length encoding the transformed data. The VLC circuit sets the encoding system type as a flag in a header of a predetermined hierarchical layer of a bit stream. By the above operation, any interlaced picture may be encoded efficiently, whether the picture includes little motion or abundant motion or includes both little motion and abundant motion in combination. A picture data decoding device detects the flag and executes decoding by changing over field-based decoding to frame-based decoding or vice versa depending on the flag for reproducing the picture data.
    • 运动矢量检测电路检测奇数场和偶场之间的每个宏块的运动矢量。 编码系统判定电路基于运动矢量的中值决定编码系统的种类,即编码系统是基于场的编码系统或基于帧的编码系统。 控制电路根据由判定系统决定的编码系统类型来控制门和切换开关,用于从缓冲存储器生成基于场的参考图像或基于帧的参考图像。 从附加节点到VLC电路的电路在参考图像和要编码的图像之间找到差分数据,同时通过离散余弦变换和变换数据的可变长度编码对差分数据进行变换。 VLC电路将编码系统类型设置为比特流的预定分层的报头中的标志。 通过上述操作,可以有效地编码任何隔行扫描图像,无论该图像包括少量运动还是丰富的运动,或者包括组合的少量运动和丰富的运动。 图像数据解码装置根据用于再现图像数据的标志,检测标志并执行基于字段的解码到基于帧的解码或反之亦然的解码。
    • 56. 发明授权
    • Variable length coding/decoding method for motion vectors
    • 运动矢量的可变长度编码/解码方法
    • US5428396A
    • 1995-06-27
    • US173042
    • 1993-12-27
    • Yoichi YagasakiJun YonemitsuMark VeltmanKatsuji IgarashiMotoki Kato
    • Yoichi YagasakiJun YonemitsuMark VeltmanKatsuji IgarashiMotoki Kato
    • H04N7/26H04N7/36H04N7/50H04N7/32
    • H04N19/517H04N19/51H04N19/61H04N19/13H04N19/91
    • In connection with compression-coding of video signals on the basis of inter-frame correlation, a single reference table is used for variable length encoding of inter-frame motion vectors established on the basis of various motion vector value ranges and degrees of accuracy. A reference table is provided for variable length encoding motion vectors based on a particular value range and degree of accuracy. In order to use the same table for motion vectors based on a larger value range than that for which the table was designed, the value of a motion vector to be encoded is divided to form a quotient and a remainder. An addition bit code is formed on the basis of the remainder and is appended to a variable length code which corresponds in the reference table to the quotient so that a variable length code value is formed for the motion vector based on the larger range. As to motion vectors based on a finer degree of accuracy than was provided for in the reference table, the motion vector value is multiplied by an appropriate factor and the resulting product is used to obtain a corresponding variable length code value from the reference table. Decoding is performed using the same table and by means of decoding operations that are the inverse of the encoding operations.
    • 结合帧间相关的视频信号的压缩编码,单个参考表用于根据各种运动矢量值范围和精度确定的帧间运动矢量的可变长度编码。 基于特定值范围和准确度提供了可变长度编码运动矢量的参考表。 为了使用相对于基于与设计表相比较大的值范围的运动矢量的相同的表,将要编码的运动矢量的值被分割以形成商和余数。 基于剩余部分形成相加位码,并将其附加到在参考表中对应于商的可变长度码,以便基于较大范围为运动矢量形成可变长度码值。 对于基于比参考表中提供的精度更精确的运动矢量的运动矢量,将运动矢量值乘以适当的因子,并且使用得到的乘积从参考表中获得相应的可变长度代码值。 使用相同的表格和通过与编码操作相反的解码操作进行解码。