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    • 5. 发明申请
    • DOWNMIX LIMITING
    • 下限限制
    • WO2012064929A1
    • 2012-05-18
    • PCT/US2011/060128
    • 2011-11-10
    • DOLBY LABORATORIES LICENSING CORPORATIONWILSON, RhondaWARD, MichaelVENEZIA, StevenDRESSLER, Roger
    • WILSON, RhondaWARD, MichaelVENEZIA, StevenDRESSLER, Roger
    • G10L19/00
    • G10L19/008H04S2400/03
    • The invention relates to downmixing techniques by which output audio signals are obtained from input audio signals partitioned into subgroups. A variable common gain limiting factor is applied to all downmix coefficients that govern the contributions from the input signals in a subgroup. While preserving the proportions between signal values within a subgroup, the invention makes it possible to limit the gain of different input signal subgroups to different extents, so that relatively more perceptible signals can be limited relatively less. It then becomes possible to achieve a consistent dialogue level while transitioning in a less perceptible fashion between signal portions with and without gain limiting. Embodiments of the invention include a method, a mixing system and a computer-program product.
    • 本发明涉及通过分割成子组的输入音频信号获得输出音频信号的下混技术。 可变的公共增益限制因子被应用于所有下调系数,这些系数控制了子组中输入信号的贡献。 在保持子组内的信号值之间的比例的同时,本发明使得可以将不同输入信号子组的增益限制在不同的范围,使得可以相对较少地限制相对更可感知的信号。 然后可以实现一致的对话级别,同时以不太可感知的方式在具有和不具有增益限制的信号部分之间转换。 本发明的实施例包括方法,混合系统和计算机程序产品。