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    • 1. 发明授权
    • Signal processing apparatus and signal receiving apparatus
    • 信号处理装置和信号接收装置
    • US06779195B2
    • 2004-08-17
    • US09326954
    • 1999-06-07
    • Katsumi OishiMasakatsu ToyoshimaKeiji Fukuzawa
    • Katsumi OishiMasakatsu ToyoshimaKeiji Fukuzawa
    • H04N720
    • H04N21/4363H04L1/004H04N21/235H04N21/434H04N21/4345H04N21/435H04N21/4532H04N21/6118H04N21/6143
    • The MPEG2TS packet S3 as the digital broadcast data is obtained from the ECC decoder. The NIT detecting circuit detects NIT from this packet S3, changes the transmitting frequency information and deletes the information (service information) of the program to be limited for viewing, thereby to obtain the table NITb. The NIT replacing circuit detects NIT from the packet S3 and replaces it to the table NITb, thereby to obtain the MPEG2TS packet S4 as the digital broadcast data in CATV. The digital broadcast signal BS1 for CATV can be obtained by executing the error correction code adding process, modulating process and frequency-converting process to the packet S4. The receiving apparatus for receiving the predetermined program on the basis of the program information of NIT can no longer receive the program in relation to the program information deleted by NIT.
    • 从ECC解码器获得作为数字广播数据的MPEG2TS数据包S3。 NIT检测电路从该分组S3检测NIT,改变发送频度信息并删除要限制的观看节目的信息(服务信息),从而获得表NITb。 NIT替换电路从分组S3检测NIT,并将其替换为表NITb,从而获得作为CATV中的数字广播数据的MPEG2TS分组S4。 用于CATV的数字广播信号BS1可以通过对分组S4执行纠错码添加处理,调制处理和频率转换处理来获得。 基于NIT的节目信息接收预定节目的接收装置不能再接收与由NIT删除的节目信息有关的节目。
    • 5. 发明授权
    • Scrambling system for an audio frequency signal
    • 用于音频信号的加扰系统
    • US4683586A
    • 1987-07-28
    • US566899
    • 1983-12-29
    • Akira SakamotoTakeshi FukamiTakehiro SugitaMasakatsu Toyoshima
    • Akira SakamotoTakeshi FukamiTakehiro SugitaMasakatsu Toyoshima
    • H04K1/06H04N7/16H04N7/167H04L9/00
    • H04K1/06
    • A scrambling system for an audio frequency signal is disclosed which employs a timebase-compressing and/or expanding system to measure the compressed and/or expanded amount of a segment time length caused in a transmission recording and reproducing system. In the scrambling system of the present invention, a marker signal is inserted into a portion between the adjoining segments and transmitted from an encoder side to a decoder side, while at the decoder side, this marker signal is detected, the synchronization is achieved by this marker signal along the compression and expansion of the segment length and the respective segments are rearranged to the original correct order. Thus, the connected portion between the segments can be made smooth so that it is possible to obtain the scrambling system for an audio frequency signal having high accuracy and high reliability.
    • 公开了一种用于音频信号的加扰系统,其采用时基压缩和/或扩展系统来测量在传输记录和再现系统中引起的段时间长度的压缩和/或扩展量。 在本发明的加扰系统中,标记信号被插入相邻段之间的部分并从编码器侧传送到解码器侧,而在解码器侧检测到该标记信号,通过该同步被实现 沿着段长度的压缩和扩展的标记信号和相应的段被重新排列成原始的正确顺序。 因此,可以使分段之间的连接部分平滑,从而可以获得具有高精度和高可靠性的音频信号的加扰系统。
    • 8. 发明授权
    • Tuning apparatus
    • 调音仪
    • US4298989A
    • 1981-11-03
    • US111188
    • 1980-01-11
    • Noboru SomenoMichimasa KomatsubaraMasakatsu Toyoshima
    • Noboru SomenoMichimasa KomatsubaraMasakatsu Toyoshima
    • H03J7/28H03J1/00H03J5/02H04B1/26H04B1/06
    • H03J5/0281H03J1/005
    • In tuning apparatus, a sensor senses when a tune indicating signal has been produced by the IF section so as to enable an adjusting circuit to change the tuning condition of the apparatus by a predetermined frequency step and then to disable the adjusting circuit if the tune indicating signal still is sensed following this frequency change so as to maintain the last-attained tuning condition. Alternatively, if the tune indicating signal no longer is sensed after the tuning condition has been changed by the predetermined frequency step, the tuning section is returned to its preceding tuning condition by this predetermined frequency step. Consequently, if the received signal is a high level signal at a frequency within a predetermined range from a broadcast frequency, the tune indicating signal is produced when the tuning condition of the tuning section differs from the broadcast frequency by this predetermined frequency step; and the tuning condition then is changed by this step so as to arrive at the desired broadcast frequency. If, however, the received signal is a low level signal, the tune indicating signal is produced only when the tuning condition of the tuning section coincides with a desired broadcast frequency, and then this tuning condition is changed by one step followed by a return of one step to the proper condition.
    • 在调谐装置中,传感器感测IF部分何时产生乐曲指示信号,以使得调整电路能够以预定频率步长改变装置的调谐状态,然后如果调谐指示 在该频率变化之后仍然感测到信号,以便保持最后达到的调谐条件。 或者,如果在调谐条件已经改变了预定频率步长之后不再感测到调谐指示信号,则调谐部分通过该预定频率步长返回到其先前的调谐条件。 因此,如果接收到的信号是从广播频率的预定范围内的频率的高电平信号,则当调谐部分的调谐条件与广播频率不同的预定频率步长时,产生乐曲指示信号; 然后通过该步骤改变调谐条件,以达到所需的广播频率。 然而,如果接收到的信号是低电平信号,则仅当调谐部分的调谐条件与期望的广播频率一致时才产生调谐指示信号,然后将该调谐条件改变一个步骤,然后返回 一步到适当的条件。