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6. 发明专利

JPS62281576A IDENTIFICATION DEVICE FOR VOICE MULTIPLEX BROADCASTING PILOT SIGNAL 失效
公开(公告)号：JPS62281576A
公开(公告)日：1987-12-07
申请号：JP12433686
申请日：1986-05-29
申请人： PIONEER ELECTRONIC CORP
发明人： SUGITA KEIZO , ISHIDA KOJI
IPC分类号： H04N5/60
摘要： PURPOSE:To obtain a device requiring no adjustment and having a high reliability by shaping the waveform of a signal obtained by AM detecting a pilot signal to convert into a digital signal (square wave signal), counting by the use of this signal and comparing the output of a counter with reference data. CONSTITUTION:The counter 3 is cleared 3 is cleared at a point A and a point C, counted up by the rise (the rise of the direction of an arrow) of the waveform (b) thereafter and the outputs C1-C4 of the counter 3 are latched to a latch circuit 4 at a point B and a point D. The output of the latched counter is '1010' (10 in decimal number) at the time of a stereophonic broadcasting, '0110' (6 in decimal number) at the time of a bilingual broadcasting or '0111' (7 in decimal number). When the reference data is defined to be '1000' (8 in decimal number), the output of the circuit 4 is compared with the reference data DR in a comparator 5, a signal indicating that the output of the counter is higher is outputted at the time of the stereophonic broadcasting and the signal indicating that it is lower is outputted at the time of the bilingual broadcasting.

7. 发明专利

JPS62237825A FM STEREO RECEPTION EQUIPMENT 失效
公开(公告)号：JPS62237825A
公开(公告)日：1987-10-17
申请号：JP8180086
申请日：1986-04-09
申请人： PIONEER ELECTRONIC CORP
发明人： SUGITA KEIZO , TOMONAGA HIROSHI , NIWA MASAHIKO , ISHII SATORU , ISHIDA KOJI , SAKAMOTO MASAHARU
IPC分类号： H04H1/00 , H04H40/72
摘要： PURPOSE:To realize the decoder section with simple constitution by selecting an (L-R) signal when a sub signal [(L-R) signal] is at a high level and selecting an (L-R)' signal being 90 deg. orthogonal modulation when the (L-R) signal is at a low level. CONSTITUTION:The (L-R)' signal being 90 deg. orthogonal modulation of the sub signal [(L-R) signal] detected by a sub detector 6 is inputted to an attenuator ATT 102 at the reception of a new system FM stereo broadcast and attenuated by 20dB and inputted to one terminal of a switch 14. Further, the (L-R) signal detected by the sub detector 5 is inputted to the other input of the switch 14 and a level detector 103. When the level of the (L-R) signal is-30dB or over, the output of the detector 103 is inputted to the switch 14 via a control circuit 104 and the switch 14 is thrown to the position of the (L-R) signal. When the (L-R) signal level is below 30dB, the output of the detector 103 is inputted similarly to the switch 14, and the switch 14 is thrown to the position of the (L-R)' signal.

8. 发明专利

JPS62230288A VIDEO SIGNAL PROCESSOR 失效
公开(公告)号：JPS62230288A
公开(公告)日：1987-10-08
申请号：JP7363486
申请日：1986-03-31
申请人： PIONEER ELECTRONIC CORP
发明人： ISHIDA KOJI
IPC分类号： H04N9/804 , H04N9/80 , H04N9/808
摘要： PURPOSE:To drastically reduce the capacity of necessary memory by providing time-differences between respective color signals R, G, and B then A/D converting them at the time of recording, and providing time differences that are inverse to the said ones between the D/A converted signals R, G, and B at the time of reproducing. CONSTITUTION:Among the signals outputted from an RGB demodulator 1, R-signal is directly inputted to an A/D converter 2, G-signal is delayed for a time tau by a delay circuit 20 then inputted to an A/D converter 3, and B-signal is delayed for a time 2tau by a delay circuit 21 then inputted to an A/D converter 4. The signals are A/D converted with a sample clock whose frequency is one third of normal frequency in the converters 2-4, and respectively stored in RAMs 10-12. The R-/G-/B-signals read out from the RAMs 10-12 are D/A converted by D/A converters 5-7, then provided with the time-differences inverse to those at the time of recording by delay circuits 22 and 23, and supplied to a display 8. As a result, in the display 8, the R-/G-/B-signals are sequentially and repeatedly displayed on one horizontal scanning line.

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