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公开(公告)号：JP2004147104A
公开(公告)日：2004-05-20
申请号：JP2002309979
申请日：2002-10-24
Inventor： HASHIMOTO YASUHIRO , TAKASHIMA MASATOSHI , HIRANAKA DAISUKE
IPC: H04N5/92 , H04N5/225 , H04N5/765 , H04N7/173 , H04N7/24 , H04N19/00 , H04N19/126 , H04N19/132 , H04N19/136 , H04N19/154 , H04N19/189 , H04N19/196 , H04N19/423 , H04N19/503 , H04N19/51 , H04N19/587 , H04N19/61 , H04N19/625 , H04N19/91 , H04N21/226 , H04N21/2343 , H04N21/24 , H04N21/6437
Abstract: PROBLEM TO BE SOLVED: To secure a minimum picture quality even when the bit rate of a coded data stream to be output is changed.
SOLUTION: The real time distribution system 1 of a moving image is provided with: a frame rate conversion part 11 for controlling the frame rate of input moving image data; a coding part 12 for compress-coding moving image data whose frame rate is controlled by MPEG-4; a frame rate calculation part 16 for calculating the set value of the frame rate; and a transmission part 13 and a reception part 14 for transmitting and receiving data through a network. The reception part 14 detects the communication situation of the network and calculates a target bit rate based on the communication situation of the detected network. The coding part 12 controls the bit rate of an MPEG-data stream according to this target bit rate. The frame rate calculation part 16 estimates the picture quality based on the quantization scale value of the coding part 12. When the picture quality is deteriorated not less than a fixed degree, the calculation part 16 lowers the frame rate.
COPYRIGHT: (C)2004,JPO-
公开(公告)号：JP2000078590A
公开(公告)日：2000-03-14
申请号：JP24277698
申请日：1998-08-28
Inventor： OGURA HIDEFUMI , TAKASHIMA MASATOSHI , HIRANAKA DAISUKE
IPC: H04N19/50 , G06T3/40 , H04N1/393 , H04N19/132 , H04N19/137 , H04N19/149 , H04N19/176 , H04N19/196 , H04N19/42 , H04N19/423 , H04N19/503 , H04N19/51 , H04N19/59 , H04N19/61 , H04N19/625 , H04N19/85 , H04N19/91 , H04N7/32
Abstract: PROBLEM TO BE SOLVED: To suppress deterioration in picture quality when encoding is performed by detecting moving vectors between frames of image data.
SOLUTION: A simple motion detecting circuit 3 detects the motion quantities (simple moving vector) between image data (current field image) inputted from outside an encoder 1 and image data (retrieved field image) inputted from a frame memory 2 and outputs them to a decision circuit 4. The decision circuit 4 determines the reduction rate of the image according to horizontal and vertical motion quantities inputted from the simple motion detecting circuit 3 and outputs information on it (image size parameter) to an image size converting circuit 5. The image size converting circuit 5 reduces the image of the image data inputted from the frame memory 2 according to the reduction parameters inputted from the decision circuit 4 and outputs the image to an encoding circuit 6. The encoding circuit 6 encodes the image data inputted from the image size converting circuit 5.
COPYRIGHT: (C)2000,JPOAbstract translation: 要解决的问题：通过检测图像数据的帧之间的移动矢量来执行编码时，抑制图像质量的劣化。 解决方案：简单运动检测电路3检测从编码器1外部输入的图像数据（当前场图像）与从帧存储器2输入的图像数据（检索到的场图像）之间的运动量（简单移动矢量），并将其输出到 判定电路4根据从简单运动检测电路3输入的水平和垂直运动量确定图像的缩小率并将其输出（图像尺寸参数）给图像尺寸转换电路5.图像 大小转换电路5根据从判定电路4输入的缩小参数，减少从帧存储器2输入的图像数据的图像，并将该图像输出到编码电路6.编码电路6对从图像输入的图像数据进行编码 尺寸转换电路5。
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公开(公告)号：JPH11251921A
公开(公告)日：1999-09-17
申请号：JP4807798
申请日：1998-02-27
Applicant: SONY CORP
Inventor： TAKASHIMA MASATOSHI , HIRANAKA DAISUKE
IPC: H04N19/102 , H03M7/40 , H04N7/08 , H04N7/081 , H04N7/24 , H04N19/00 , H04N19/146 , H04N19/169 , H04N19/196 , H04N19/423 , H04N19/46 , H04N19/70 , H04N19/91
Abstract: PROBLEM TO BE SOLVED: To provide a compression-encoding device and method capable of guaranteeing the read of all data even in the case that an unreadable data amount is present in the transmission system of the data. SOLUTION: A controller 15 writes the header of an access unit desired to be read to an output buffer one access unit before the timing of reading encoding data from the output buffer. That is, after the data of the access unit are generated, the header of the next access unit is immediately generated in a VLC(variable length coding) circuit 14. After the encoding of a certain access unit is ended, the read of all the data is surely made possible fixed time later and multiplex or transmission processings or the like to be processed in the poststage are substantially simply and easily controlled.
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公开(公告)号：JP2545895B2
公开(公告)日：1996-10-23
申请号：JP30706987
申请日：1987-12-04
Applicant: SONY CORP
Inventor： MAIKUMA MASAHIRO , TAKASHIMA MASATOSHI
IPC: G11B15/18 , G11B15/467 , H04N5/783
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公开(公告)号：JPH07288818A
公开(公告)日：1995-10-31
申请号：JP10470694
申请日：1994-04-19
Applicant: SONY CORP
Inventor： TAKASHIMA MASATOSHI
IPC: H04N11/04 , G06T7/20 , H04N19/42 , H04N19/423 , H04N19/436 , H04N19/50 , H04N19/503 , H04N19/51 , H04N19/577 , H04N7/32
Abstract: PURPOSE:To reduce the circuit scale by deviating a reference block with respect to a search area so as to reduce the number of delay circuits when plural motion vector detection units are arranged to extend the search area. CONSTITUTION:A digital video signal is given to an input terminal 42 and in the case of 1, P, B frames, the frames are received by selecting selectors 3-7 respectively. Each of motion vector detection units 30-41 has a 16X16 picture element of block size and a 32X32 picture element of search area. In the case of the P frame, image data in the search area of the retrieved frame are read from a frame memory 1 via the selector 3 delay circuits 11, 12 and the selector 5. Image data from the terminal 42 are given to delay circuits 21-25, from each stage of which image data of a reference block are obtained. The search area is processed as areas A1-A12. by the 12 detection units 30-41. Since the data of the reference block from the terminal 42 are fed to the units 30-41 from each stage via the circuits 21-25, the reference block is deviated with respect to the search area.
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Patent Agency Ranking
公开(公告)号：JPH0767106A
公开(公告)日：1995-03-10
申请号：JP23229093
申请日：1993-08-25
Applicant: SONY CORP
Inventor： OTSUKI TOMOYUKI , TAKASHIMA MASATOSHI
Abstract: PURPOSE:To enable optimum motion compensation when converting differential data to a frequency area and quantizing it by converting the data of difference between a present frame and a motion compensated reference frame to the data of the frequency area and forming an evaluation value for detecting a matching block. CONSTITUTION:Concerning the inspection block of the reference frame, a prescribed vector search range is moved for each picture element. A comparison and judgement circuit 10 judges the inspection block closest to the reference block from the evaluation value formed by converting the value of difference between the pixel data of the reference block of the present frame and the pixel data of the inspection block of the reference frame to the frequency area. This inspection block is defined as the matching block, and a motion vector is judged from this matching block. This motion vector detection is suitable for performing the motion compensation when converting the data of difference between the present frame and the reference frame to the frequency area and encoding it like an MPEG system.
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公开(公告)号：JPH0676474A
公开(公告)日：1994-03-18
申请号：JP25406392
申请日：1992-08-28
Applicant: SONY CORP
Inventor： NITTA HAJIME , TAKASHIMA MASATOSHI , SAITO TAKEHIKO , NAKAGAWA TOMIHIRO , YAMASHITA KEITARO
IPC: G11B20/00 , G11B20/10 , G11B27/034 , G11B27/32 , G11B27/34 , H04N5/765 , H04N5/85 , H04N5/926 , H04N7/50 , G11B19/02
Abstract: PURPOSE:To make recording data possible without extra and deficiency by controlling the compressing rate of data in accordance with capacity capable of recording information of a recording medium and the length of information to be recorded. CONSTITUTION:When an input part 13 is operated and recording start is commanded, an arithmetic circuit 12 reads the recording possible capacity (remaining quantity) of a disk 15 and displays it in a display part 14. A user operates the input part 13 and inputs recording capacitance (w) to be recorded and the recording time (t) of the information. Then, the circuit 12 calculates an average transmission rate R1 from a following expression: R1=w/t-alpha, provided that alpha is the transmission rate for audio data and other additional data which are added to video data in a system multiplexing encoder 9. Then, the circuit 12 permits the display part 14 to display picture equality at the time of recording a video signal at the average transmission rate R1. When picture quality displayed in the display part 14 is sufficient, it is inputted from the input part 13 and recording is executed at the average transmission rate R1.
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公开(公告)号：JPH05336492A
公开(公告)日：1993-12-17
申请号：JP16396392
申请日：1992-05-29
Applicant: SONY CORP
Inventor： TAKASHIMA MASATOSHI
Abstract: PURPOSE:To provide the nonlinear digital signal processing circuit eliminating the influence of distortion brought about by the presence of a limiter for performing nonlinear processing by limiting amplitude and having no negative feedback path suitable for the digital signal processing. CONSTITUTION:The nonlinear digital signal processing circuit is provided with a feed forward type nonlinear de-emphasis circuit 10A having no negative feedback path, a nonlinear emphasis circuit 40A, a distortion correction circuit 30, and a signal subtraction circuit 35. The nonlinear de-emphasis processing is performed in the de-emphasis circuit 10. The distortion brought about by a limiter 16 in the de-emphasis circuit 10A is detected by the emphasis circuit 40A and the distortion correction circuit 30. In the signal subtraction circuit 35, the distortion component from the distortion correction circuit 30 is subtracted from the nonlinear de-emphasis signal containing the distortion from the de-emphasis circuit 10A.
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公开(公告)号：JPH05244565A
公开(公告)日：1993-09-21
申请号：JP4363792
申请日：1992-02-28
Applicant: SONY CORP
Inventor： TAKASHIMA MASATOSHI , SAKAMOTO ETSURO
Abstract: PURPOSE:To effectively reduce reproduction noise. CONSTITUTION:This reducer is provided with a difference detection means 56 detecting a difference between reproduced video signals of preceding and succeeding fields or frames, a variable limiter circuit 57 receiving a difference detection output, a subtractor 53 subtracting its limiter output from a present reproduction video signal to reduce noise, and a noise quantity detection circuit 60 detecting the absolute quantity of noise included for a specific period of the difference detection output and outputting a control signal in response to the absolute quantity and the limiter quantity is adaptively controlled in response to the noise quantity by selecting the limiter characteristic of the variable limiter circuit 57 depending on the control signal.
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公开(公告)号：JPH05168040A
公开(公告)日：1993-07-02
申请号：JP35361591
申请日：1991-12-17
Applicant: SONY CORP
Inventor： TAKASHIMA MASATOSHI , OIKAWA YUKA
Abstract: PURPOSE:To prevent picture quality of a regenerative image to be changed corresponding to an ID signal from being degraded by replacing an YC guard signal with a prescribed reference signal after time division multiplexing a color difference signal and a luminance signal while switching the YC guard signal corresponding to the ID signal. CONSTITUTION:A time division multiplexing circuit 42 generates time division multiplexing signals S11 and S12 by interpolating YC guard signals SY2A-SY2D during the YC guard periods of a color difference signal C and a luminance signal Y. Emphasis processing circuits 8A and 8B process the time division multiplexing signals S11 and S12. Concerning emphasis processed signals S3 and S4, YC guard adding circuits 12A and 12B replace the YC guard signals SY2A-SY2D with the prescribed reference guard signal and output the signals while adding ID signal ID1-ID4. Therefore, since the YC guard signals SY2A-SY2 D are selected into a prescribed signal waveform corresponding to the ID signals, the waveform distortion of the regenerative signal to be changed corresponding to the ID signal can be prevented.
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