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    • 6. 发明申请
    • METHOD AND APPARATUS FOR MULTICHANNEL SIGNAL LIMITING
    • 多通道信号限制的方法与装置
    • WO2006073515A1
    • 2006-07-13
    • PCT/US2005/030210
    • 2005-08-25
    • SONY ERICSSON MOBILE COMMUNICATIONS ABROMESBURG, Eric, DouglasGUSTAVSSON, Stefan
    • ROMESBURG, Eric, DouglasGUSTAVSSON, Stefan
    • H03G3/20H04S3/00
    • H03G7/00H03F3/68H03F2200/435
    • A method and apparatus provide multichannel signal limiting to prevent any channel signal within a multichannel signal from exceeding defined limits, while still preserving the gain and/or amplitude relationships among the individual channel signals. A limiter is configured to calculate a limiting factor as the value needed to prevent a limit violation on the worst-case one of the channel signals, and then commonly apply that limiting factor to the gain control of all channel signals. Thus, the limiter may generate an actual gain value for each channel signal as the product of that channel signal's desired gain value and the current value of the limiting factor. Notably, in multichannel audio signal applications, coordinating gain control across the individual audio channels by use of the commonly applied limiting factor prevents undesirable spatial shifting of the soundstage, e.g., shifting of the stereo image.
    • 一种方法和装置提供多信道信号限制,以防止多信道信号中的任何信道信号超过限定的限制,同时仍然保持各个信道信号之间的增益和/或幅度关系。 限制器被配置为计算限制因子作为防止对最坏情况的一个信道信号的限制违反所需的值,然后通常将该限制因子应用于所有信道信号的增益控制。 因此,限幅器可以产生每个信道信号的实际增益值,作为该信道信号的期望增益值与限制因子的当前值的乘积。 值得注意的是,在多声道音频信号应用中,通过使用通常应用的限制因素来协调各个音频通道的增益控制可防止声场的不期望的空间移动,例如立体声图像的移位。
    • 10. 发明申请
    • NORMALIZING THE LOUDNESS OF AUDIO RECORDINGS
    • 正常化音乐录音的乐趣
    • WO2006055058A1
    • 2006-05-26
    • PCT/US2005/026092
    • 2005-07-22
    • SONY ERICSSON MOBILE COMMUNICATIONS ABROMESBURG, Eric, DouglasEATON, Williams, Chris
    • ROMESBURG, Eric, DouglasEATON, Williams, Chris
    • G11B20/10H04M19/04H04M3/533H03G3/30
    • G11B20/10527H03G3/002H04M1/6016H04M1/652H04M1/7253H04M1/7255H04M3/40H04M3/533
    • A method and apparatus normalizes the playback loudness of stored sound recordings to avoid objectionable variations in perceived loudness between different sound recordings at the same volume setting. In an exemplary processing method, a stored sound recording is processed to determine its loudness. That loudness, or some value derived from it, is then used to set the playback gain used for playing back the sound recording. Thus, for a given volume setting, the playback gain can be set lower for louder recordings, and higher for quieter recordings. In one or more exemplary embodiments, sound recordings are processed as received, or at least some time in advance of their first playback, so that a loudness-based gain compensation parameter can be calculated and stored for them. The corresponding stored gain control parameter can then be selected and used responsive to selecting a particular sound recording for playback.
    • 一种方法和装置使存储的声音记录的回放响度正常化,以避免在相同音量设置下不同声音记录之间的感知响度的不良变化。 在示例性处理方法中,处理存储的声音记录以确定其响度。 然后,使用该响度或从其导出的一些值来设置用于回放录音的回放增益。 因此,对于给定的音量设置,可以将较高的录音设置为较低的播放增益,而对于较安静的录音,播放增益更高。 在一个或多个示例性实施例中,声音记录被处理为接收的,或者在其第一次回放之前的至少一些时间处理,从而可以为它们计算和存储基于响度的增益补偿参数。 响应于选择用于回放的特定声音记录,可以选择和使用相应的存储的增益控制参数。