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    • 5. 发明授权
    • Digital broadcast receiving device capable of indicating a receiving
signal strength or quality
    • 能够指示接收信号强度或质量的数字广播接收装置
    • US5966186A
    • 1999-10-12
    • US893527
    • 1997-07-11
    • Hideo ShigiharaYasuyuki Nonaka
    • Hideo ShigiharaYasuyuki Nonaka
    • H04N19/00H04B1/10H04B1/16H04L1/00H04N7/00H04N17/00H04N17/04H04N19/65H04N19/70H04N19/85H04N5/50
    • H04N17/04H04N17/004H04N21/4381H04N21/44209H04N5/4401H04N21/485
    • An error detecting/correcting circuit 9 in a digital broadcast receiving device calculates a error rate from the error amount for the amount of input information. A controlling part 15 converts the error rate into the C/N ratio as a receiving signal quality and indicates it on a screen of a TV receiver 5 or other indicator 18. In this method, after digitally demodulating the received digital broadcasting signal, the error rate is obtained by an error detecting part 9 and the error rate is converted into the receiving signal quality for indication. Therefore, compared with the reception performance indication based on the input level such as the AGC voltage, the method is high both in precision and in stability. The receiving signal quality can be detected only while receiving a digital broadcasting signal, so with reference to the converted receiving signal quality in antenna bearing adjustment, a digital broadcasting signal can be surely received without confusing it with an analog broadcasting signal.
    • 数字广播接收装置中的错误检测/校正电路9根据输入信息量的误差量计算错误率。 控制部分15将误差率转换为C / N比作为接收信号质量,并将其指示在TV接收机5或其它指示器18的屏幕上。在该方法中,在对接收的数字广播信号进行数字解调之后,误差 速率通过错误检测部分9获得,并且错误率被转换成用于指示的接收信号质量。 因此,与基于诸如AGC电压的输入电平的接收性能指示相比,该方法在精度和稳定性方面都很高。 只有在接收数字广播信号时才能检测到接收信号质量,所以参考天线方向调整中的转换的接收信号质量,可以可靠地接收数字广播信号而不会混淆模拟广播信号。