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    • 1. 发明授权
    • Music information transmission system
    • 音乐信息传输系统
    • US4535356A
    • 1985-08-13
    • US451552
    • 1982-12-20
    • Koichi NakagawaYoshio SugimoriYoshihide KimataYosai ArakiTomoji Arai
    • Koichi NakagawaYoshio SugimoriYoshihide KimataYosai ArakiTomoji Arai
    • H04N7/088H04N7/04H04N7/08
    • H04N7/088Y10S84/06
    • A music information transmission system in which a music symbol on a music sheet is quantized into a digital signal by inputting that music symbol by using a key board. The digital signal is assembled into a packet, which is multiplexed on a blanking period of a television signal, and is transmitted over the air. At a reception side, the packet is separated from a picture signal, and is stored in a memory. A music player reads out the memory, and decodes the digital signal in the memory. The decoded signal operates the music player to play music. Thus, music information may be transmitted in a very narrow frequency band as compared with a conventional PCM system which quantizes an analog sound signal into a digital signal. The present invention is useful for instance for playing background music in a teletext or a character transmission system multiplexed with a television signal.
    • 一种音乐信息传输系统,其中通过使用键盘输入该音乐符号将乐谱上的音乐符号量化为数字信号。 数字信号被组装成分组,其在电视信号的消隐时段上被复用,并且通过空中传输。 在接收侧,分组与图像信号分离,并存储在存储器中。 音乐播放器读出存储器,并解码存储器中的数字信号。 解码的信号操作音乐播放器播放音乐。 因此,与将模拟声音信号量化为数字信号的传统PCM系统相比,音乐信息可以在非常窄的频带中发送。 本发明例如用于在电视文字播放背景音乐或与电视信号复用的字符传输系统中是有用的。
    • 3. 发明授权
    • Low-noise television system
    • 低噪音电视系统
    • US4779133A
    • 1988-10-18
    • US109066
    • 1987-10-16
    • Yoshio SugimoriYoshihide KimataYosai Araki
    • Yoshio SugimoriYoshihide KimataYosai Araki
    • H04N5/213H04N5/923
    • H04N5/213H04N5/923
    • A low-noise televison system having means for suppressing increased noise without reduction of improved picture quality. In the television broadcast transmitter, a television video signal is separated into luminance and chrominance signals and the luminance signal is further separated into high and low frequency components. The high frequency component is pre-emphasized in a specific emphasis characteristic relating to the amplitude of the low frequency component and the pre-emphasized high frequency component is then combined with the low frequency component and further matrixed with the chrominance signal to recover the video signal to be transmitted. In the television receiver, the received video signal is separated into luminance and chrominance signals and the luminance signal is further separated into high and low frequency components in similar fashion to the transmitter. The high frequency component is de-emphasized in a characteristic opposite of emphasis characteristic of the transmitter in accordance with the amplitude of the low frequency component and the de-emphasized high frequency component is then combined with the low frequency component and further matrixed with the chrominance signal to recover the video signal to be displayed.
    • 一种低噪声电视系统,具有抑制增加的噪声而不降低图像质量的装置。 在电视广播发送机中,将电视视频信号分离为亮度和色度信号,并将亮度信号进一步分为高频和低频分量。 在与低频分量的振幅相关的特定强调特性中预先强调高频分量,然后将预先强调的高频分量与低频分量组合并进一步与色度信号进行比较以恢复视频信号 被传送。 在电视接收机中,接收到的视频信号被分成亮度和色度信号,亮度信号被进一步分成高频和低频分量,与发射机相似。 根据低频分量的幅度,高频分量与发射机的强调特性相反的特性被去强调,然后将去加重的高频分量与低频分量组合,并进一步与色度 信号恢复要显示的视频信号。