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11. 发明专利

JPS6433756A DEVICE FOR DETECTING TRACKING ERROR 失效
公开(公告)号：JPS6433756A
公开(公告)日：1989-02-03
申请号：JP18927587
申请日：1987-07-29
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： IDE AKIFUMI
IPC分类号： G11B15/467
摘要： PURPOSE:To exactly detect a tracking error by equipping a regular detector, another detector whose characteristic is different and the detector of the data difference of the both detectors. CONSTITUTION:A recording signal from a magnetic tape 1 is led through a magnetic head 2, a head amplifier 3 and an equalizer 4 to first and second detectors 6 and 7 and a clock generator 5. According to the dislocation of a tracking, the S/N of a reproduced signal is gradually lowered, however, for the first detector 6, an error rate is largely changed by the small change of the S/N at a threshold (S/N)0 of the S/N as a border. The second detector 7 is a little dislocated from a regular detecting characteristic, the error rate is not extremely changed at the (S/N)0 and an error gradually starts to increase preceding to the detector 6. At such a time, when the generating frequency of the difference of the detected result of the both detectors is supervised by a detector 8, information to correspond to the tracking error can be obtained from a terminal 11.

12. 发明专利

JPS6367829A DIGITAL INFORMATION TRANSMITTER 失效
公开(公告)号：JPS6367829A
公开(公告)日：1988-03-26
申请号：JP21226986
申请日：1986-09-09
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： IDE AKIFUMI
IPC分类号： H04B3/06 , G11B20/10 , H04L25/03
摘要： PURPOSE:To automatically make the best adjustment by correcting the coefficient of an equalizer at every time while deciding whether error detection data generated by a reception-side processor increases or decreases. CONSTITUTION:The output of the equalizer 2 is applied to a detector 3, detected as a binary signal (ternary signal or more according to a modulation system), and demodulated by a demodulator 4. Error detection information generated by the processing stage of the reception-side processor 5 is led to a coefficient controller 8. The coefficient controller 8 controls the coefficient in the equalizer 2 in such a direction that an error frequency decreases according to an input error pointer. Consequently, the characteristics of the equalizer can be set automatically so that the error generation is invariably minimum, and even if a transmission line changes in state or when compatible reproduction is performed by a magnetic recording and reproducing device, the equalization characteristics need not be readjusted at every time.

13. 发明专利

JPS6262685A HIGHLY EFFICIENT ENCODER 失效
公开(公告)号：JPS6262685A
公开(公告)日：1987-03-19
申请号：JP20207585
申请日：1985-09-12
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： SHIGESATO TATSURO , IKETANI AKIRA , YAMAMITSU CHOJURO , IDE AKIFUMI
IPC分类号： H04N19/60
摘要： PURPOSE:To reduce a prediction error and a quantizing error determining a prediction coefficient to respective orthogonal components based on the vertical and horizontal correlation of the respective orthogonal components and changing the prediction coefficient and the quantizing characteristic of other orthogonal component from the prediction error of a part of the orthogonal component. CONSTITUTION:A value obtained by multiplying an orthogonal component corresponding to H3 of the adjacent block by 1/4 by a multiplier 21 in the horizontal direction which is the and a value obtained by multiplying an orthogonal component corresponding to H3 of adjacent block by 3/4 by a multiplier 23 in the vertical direction which is the output of a buffer 27 are added by an adder 17 to have a prediction value to the H3. Similarly, the prediction value to H4 is calculated. prediction errors D3, D4 to the quantized H3, H4 of outputs of quantizers 9, 10 are inputted to a comparator 25. In the comparator 25, the values of D3 and D4 are examined and a horizontal prediction coefficient alpha to and a vertical prediction coefficient beta to H1, H2 are determined. In this manner, the prediction values of the respective orthogonal components are calculated by using the respectively suitable prediction coefficients, so that the prediction error is reduced.

14. 发明专利

JPS6254871A RECORDING AND REPRODUCING DEVICE 失效
公开(公告)号：JPS6254871A
公开(公告)日：1987-03-10
申请号：JP19511885
申请日：1985-09-04
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： IDE AKIFUMI
IPC分类号： G11B5/02 , G11B5/027 , G11B20/00
摘要： PURPOSE:To cancel inter-channel crosstalk by applying a prescribed weighting to respective reproduction outputs, then adding them with each other when reproducing. CONSTITUTION:The outputs from head amplifiers 6-9 are respectively supplied to adders 22-25 and coefficient multipliers 10-21. In such a case, the channels corresponding to magnetic heads 2-5 are denoted respectively as channel A1, channel A2, channel B1, and channel B2. The coefficient of the multiplier 10 is a sign-inversed value of the quantity of crosstalk from the channel A2 to the channel A1. That is, if the said quantity is a 5% of the channel A2, the said coefficient of the multiplier 10 goes to the inverse of 0.05. Similarly, the coefficients of the multipliers 11 and 12 are the sign-inversed values of the quantities of crosstalks respectively from the channels B1 and B2 to the channel A1. Also similarly, those of the multipliers 13-21 are the sign-inversed values of the quantities of crosstalks between respective channels. By setting the coefficients of the multipliers 10-21 in such a way, the inter-channel crosstalk is canceled from the adders 22-25.

15. 发明专利

JPS6212957A DIGITAL SIGNAL DETECTOR 失效
公开(公告)号：JPS6212957A
公开(公告)日：1987-01-21
申请号：JP15075885
申请日：1985-07-09
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： IDE AKIFUMI
IPC分类号： G11B20/10
摘要： PURPOSE:To correct automatically a threshold value for detection at all time to an ideal value by providing a positive peak detector, a low pass filter, a negative peak detector, and a comparator which compares a reproduced signal with a threshold value generated by a threshold generator and obtains an output. CONSTITUTION:The output of an equalizer of a reproduction system is inputted to the positive peak detector 2, the negative peak detector 4, and the comparator 7 through a terminal 1. The detector 2 detects the positive peak value of the inputted signal, and the detector 4 detects the negative peak value of the same. The output from the detector 2 and that from the one 4 are impressed respectively to the low pass filters 3 and 5. The low pass filters 3 and 5 eliminate the local variation of the outputs from the positive peak detector 2 and the negative peak detector 4 respectively, and the tendency of a comparatively long period of the both peaks are extracted. The threshold value generator 6 generates the threshold value based on the outputs from the both low pass filters 3 and 5. The output from the generator 6 and the signal supplied through the terminal 1 are compared by the comparator 7, and its detection output is sent through an output terminal 8.

16. 发明专利

JPS6158074B2 失效
公开(公告)号：JPS6158074B2
公开(公告)日：1986-12-10
申请号：JP8181378
申请日：1978-07-04
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： IDE AKIFUMI
IPC分类号： H04N5/94 , G11B20/06

17. 发明专利

JPS6056029B2 失效
公开(公告)号：JPS6056029B2
公开(公告)日：1985-12-07
申请号：JP5590678
申请日：1978-05-10
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： IDE AKIFUMI
IPC分类号： H04N5/953 , G11B5/027 , G11B20/02

18. 发明专利

JPS60226216A PHASE LOCKED LOOP OSCILLATOR 失效
公开(公告)号：JPS60226216A
公开(公告)日：1985-11-11
申请号：JP8189484
申请日：1984-04-25
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： IDE AKIFUMI
IPC分类号： H03L7/081 , H03L7/06
摘要： PURPOSE:To allow the titled oscillator to follow up a high angular frequency of phase fluctuation of an input signal without any error by applying an output of a voltage controlled oscillator to a phase shifter whose phase shift amount is controlled by an output of a phase comparator. CONSTITUTION:A loop of the phase locked oscillation is constituted by the phase comparator 2, a filter 3 and the voltage-controlled oscillator 4. If a phase fluctuation takes place in a signal fed via an input terminal 1, an ouptut of the voltage controlled oscillator 4 is fed to the phase shifter 8, and corrected in the process when an output signal passes through the phase shifter 8 to make the phase in phase with that of the signal fed to the input terminal 1 and the result is outputted via an output terminal 5. Thus, the phase is followed up correctly without any error.

19. 发明专利

JPS60196087A Video signal transmitter 失效
标题翻译：视讯信号发射机
公开(公告)号：JPS60196087A
公开(公告)日：1985-10-04
申请号：JP5257284
申请日：1984-03-19
申请人： Matsushita Electric Ind Co Ltd
发明人： IDE AKIFUMI , YAMAMITSU CHIYOUJIYUROU , OGURA ICHIROU
IPC分类号： H04N5/926 , H04N7/24 , H04N19/00 , H04N7/13
CPC分类号： H04N7/24 , H04N5/926
摘要： PURPOSE:To attain correction with extremely reduced deterioration in picture quality by means of approximate picture elements by forming a sub-block after interleaving to provide an error detecting function for each sub-block and therefore dispersing the correcting picture elements in case an error remains. CONSTITUTION:An error correcting coder 4, an error correcting decoder 8 and a correcting part are added newly. The output data of a record side processor 3 is supplied to an interleaving device 46 via an input terminal 45. The device 46 interleaves the input data after changing their orders and impresses them to a subblock producer 47. The producer 47 divides the impressed data for each prescribed number and also produces an error detecting word and then a sub-block. The output of the producer 47 is impressed to a parity block producer 48 to produce the parity data to the prescribed sub-block length. Thus a parity block is produced. In such a way, the error corrected/coded data is applied to a modulator 5 via an output terminal 49.
摘要翻译：目的：通过在交错之后形成子块，通过近似图像元素极大地降低图像质量的劣化，从而为每个子块提供错误检测功能，从而在错误保留的情况下分散校正图像元素。构成：新增了纠错编码器4，纠错解码器8和校正部。记录侧处理器3的输出数据经由输入端45被提供给交错装置46.装置46在改变它们的订单之后对输入数据进行交织，并将它们压印到子块生成器47.生成器47将印象数据分割为每个规定的数字，并且还产生一个错误检测字，然后产生一个子块。生成器47的输出被加到奇偶校验块生成器48，以产生奇偶校验数据到规定的子块长度。因此产生了奇偶校验块。以这种方式，纠错/编码数据经由输出端子49被加到调制器5上。

20. 发明专利

JPS59141890A Magnetic recording and reproducing device of video signal 失效
标题翻译：视频信号的磁记录和再现设备
公开(公告)号：JPS59141890A
公开(公告)日：1984-08-14
申请号：JP1542383
申请日：1983-02-03
申请人： Matsushita Electric Ind Co Ltd
发明人： MORIMOTO TAKESHI , YAMAMITSU CHIYOUJIYUROU , IDE AKIFUMI
IPC分类号： H04N5/94 , H04N9/81 , H04N9/86 , H04N9/87 , H04N9/88 , H04N9/89
CPC分类号： H04N9/89 , H04N9/87
摘要： PURPOSE:To reduce both cost and scale of a circuit by using a single horizontal scan delay line used to a comb-shaped filter or a simultaneous converter, etc. and a double horizontal scan delay line for processing of a luminance signal in combined with a delay line for drop-out compensation. CONSTITUTION:A switch 58 is connected to a switch terminal 59 for the time when no drop-out exists, and therefore the signal supplied to an input terminal 60 is delayed by a double horizontal scan delay line 61 and delivered to an input terminal 62. While the switch 58 is connected to a switch terminal 63 when a drop-out is generated. Then the output of the line 61 is used as the input of the line 61 in place of the input signal having a drop-out. Thus a drop-out can be compensated.
摘要翻译：目的：通过使用用于梳状滤波器或同时转换器等的单个水平扫描延迟线和用于处理亮度信号的双水平扫描延迟线来降低电路的成本和尺寸，延迟线用于辍学补偿。构成：开关58连接到开关端子59，在不存在辍学的时候，因此提供给输入端子60的信号被延迟了双水平扫描延迟线61并被传送到输入端子62。当产生辍学时，开关58连接到开关端子63。然后，行61的输出用作行61的输入，代替具有退出的输入信号。因此，可以补偿辍学。

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