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公开(公告)号：EP3312991A1
公开(公告)日：2018-04-25
申请号：EP17205925.5
申请日：2009-03-03
发明人： BAZARJANI, Seyfollah , MIAO, Guoqing , FITZGERALD, Joseph, R. , KULKARNI, Prajakt, V. , GAGNE, Justin, Joseph Rosen , MCALLISTER, Gene, H. , HINRICHS, Jeffrey , VAN DER WAGT,, Jan, Paul
CPC分类号： H03F1/0222 , H03F1/0211 , H03F2200/03 , H03G3/30 , H03G3/3005 , H03G3/32
摘要： A system and method of improving the efficiency in the power consumption of an audio system. In essence, the technique is to adjust the power delivered from the power supply to the analog section, such as the power amplifier, in response to the volume level indicated by the volume control module and/or in response to the detected characteristic of the input audio signal. Thus, in this manner, the analog section is operated in a manner that is related to the level of the signal it is processing. Additionally, the system and method also relate to a technique of adjusting the dynamic ranges of the digital signal and the analog signal to improve the overall dynamic range of the system without needing to consume additional power.
摘要翻译： 提高音频系统功耗效率的系统和方法。 本质上，该技术是响应于由音量控制模块指示的音量水平和/或响应于所检测到的输入特性而调整从电源传送到诸如功率放大器的模拟部分的功率 音频信号。 因此，以这种方式，模拟部分以与其正在处理的信号的电平有关的方式进行操作。 此外，该系统和方法还涉及调整数字信号和模拟信号的动态范围以提高系统的整体动态范围而不需要消耗额外功率的技术。
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公开(公告)号：EP2126895A1
公开(公告)日：2009-12-02
申请号：EP08714257.6
申请日：2008-03-17
发明人： KAMATH, Nidish, Ramachandra , CHOY, Eddie, L.T. , KULKARNI, Prajakt, V. , GUPTA, Samir, Kumar , MOLLOY, Stephen , DEVALAPALLI, Suresh
IPC分类号： G10H7/00
CPC分类号： G10H7/004 , G10H1/0066 , G10H2230/031 , G10H2250/541
摘要： This disclosure describes techniques that make use of a plurality of hardware elements that operate simultaneously to service synthesis parameters generated from one or more audio files, such as musical instrument digital interface (MIDI) files. In one example, a method comprises storing audio synthesis parameters generated for one or more audio files of an audio frame, processing a first audio synthesis parameter using a first audio processing element of a hardware unit to generate first audio information, processing a second audio synthesis parameter using a second audio processing element of the hardware unit to generate second audio information, and generating audio samples for the audio frame based at least in part on a combination of the first and second audio information.
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公开(公告)号：EP2269301B1
公开(公告)日：2020-04-15
申请号：EP09716435.4
申请日：2009-03-03
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公开(公告)号：EP2126892A2
公开(公告)日：2009-12-02
申请号：EP08714247.7
申请日：2008-03-17
发明人： KAMATH, Nidish, Ramachandra , KULKARNI, Prajakt, V. , GUPTA, Samir, Kumar , MOLLOY, Stephen , DEVALAPALLI, Suresh , ALEMANIA, Allister
IPC分类号： G10H7/00
CPC分类号： G10H7/004 , G10H2230/031 , G10H2250/641
摘要： This disclosure describes techniques that make use of a waveform fetch unit that operates to retrieve waveform samples on behalf of each of a plurality of hardware processing elements that operate simultaneously to service various audio synthesis parameters generated from one or more audio files, such as musical instrument digital interface (MIDI) files. In one example, a method comprises receiving a request for a waveform sample from an audio processing element, and servicing the request by calculating a waveform sample number for the requested waveform sample based on a phase increment contained in the request and an audio synthesis parameter control word associated with the requested waveform sample, retrieving the waveform sample from a local cache using the waveform sample number, and sending the retrieved waveform sample to the requesting audio processing element.
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公开(公告)号：EP2269301A2
公开(公告)日：2011-01-05
申请号：EP09716435.4
申请日：2009-03-03
发明人： BAZARJANI, Seyfollah , MIAO, Guoqing , FITZGERALD, Joseph, R. , KULKARNI, Prajakt, V. , GAGNE, Justin, Joseph Rosen , MCALLISTER, Gene, H. , HINRICHS, Jeffrey , VAN DER WAGT, Jan, Paul
摘要： A system and method of improving the efficiency in the power consumption of an audio system. In essence, the technique is to adjust the power delivered from the power supply to the analog section, such as the power amplifier, in response to the volume level indicated by the volume control module and/or in response to the detected characteristic of the input audio signal. Thus, in this manner, the analog section is operated in a manner that is related to the level of the signal it is processing. Additionally, the system and method also relate to a technique of adjusting the dynamic ranges of the digital signal and the analog signal to improve the overall dynamic range of the system without needing to consume additional power.
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公开(公告)号：EP2126890A1
公开(公告)日：2009-12-02
申请号：EP08714251.9
申请日：2008-03-17
CPC分类号： G10H1/0066 , G10H7/002
摘要： Techniques are described of generating a digital waveform for a Musical Instrument Digital Interface (MIDI) voice using a set of machine-code instructions that is specialized for the generation of digital waveforms for MIDI voices. For example, a processor may execute a software program that generates a digital waveform for a MIDI voice. The instructions of the software program may be machine code instructions from an instruction set that is specialized for the generation of digital waveforms for MIDI voices. In particular, the execution of one of the instructions may involve a selection of an operation based on a set of parameters that define a MIDI voice and the performance of the selected operation.
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公开(公告)号：EP2076899A1
公开(公告)日：2009-07-08
申请号：EP08714245.1
申请日：2008-03-17
CPC分类号： G10H7/004 , G10H1/0066
摘要： This disclosure describes techniques for processing audio files that comply with the musical instrument digital interface (MIDI) format. In particular, this disclosure describes storage of MIDI parameters for efficient access by a processor and a hardware unit. The processor may be a digital signal processor (DSP) and the hardware unit may be specifically designed to process MIDI parameters. In one aspect, this disclosure provides an apparatus comprising a processor that converts a MIDI event into MIDI parameters, a hardware unit that uses MIDI parameters to generate audio samples, and a plurality of storage units that store MIDI parameters which are accessible by both the processor and the hardware unit.
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