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1. 发明授权

US07718882B2 Efficient identification of sets of audio parameters 有权
标题翻译：高效识别音频参数集
公开(公告)号：US07718882B2
公开(公告)日：2010-05-18
申请号：US12042121
申请日：2008-03-04
申请人： Suresh Devalapalli , Prajakt Kulkarni , Nidish Ramachandra Kamath
发明人： Suresh Devalapalli , Prajakt Kulkarni , Nidish Ramachandra Kamath
IPC分类号： G10H1/00
CPC分类号： G10H1/22
摘要： Techniques are described of efficiently identifying sets of audio parameters to be applied during a time frame. For example, a list of indicators may be generated. Each of the indicators in the list may indicate a Musical Instrument Digital Interface (MIDI) voice present in a MIDI frame. Furthermore, in generating the list, the indicators in the list may be restricted to those indicators that indicate the most acoustically significant MIDI voices in the MIDI frame. After the list is generated, a digital waveform may be generated for each of MIDI voices indicated by an indicator in the list. A combination of the waveforms of each MIDI voice may constitute an overall waveform for the MIDI frame.
摘要翻译：描述了在时间范围内有效地识别要应用的音频参数集合的技术。例如，可以生成指标列表。列表中的每个指示符可以指示存在于MIDI帧中的乐器数字接口（MIDI）语音。此外，在生成列表时，列表中的指示符可以限于指示MIDI帧中最具声学意义的MIDI声音的指示符。在列表生成之后，可以为列表中的指示符指示的每个MIDI语音生成数字波形。每个MIDI声音的波形的组合可以构成MIDI帧的整体波形。

2. 发明授权

US07663046B2 Pipeline techniques for processing musical instrument digital interface (MIDI) files 失效
标题翻译：用于处理乐器数字接口（MIDI）文件的管道技术
公开(公告)号：US07663046B2
公开(公告)日：2010-02-16
申请号：US12042170
申请日：2008-03-04
申请人： Prajakt Kulkarni , Eddie L. T. Choy , Nidish Ramachandra Kamath , Samir K Gupta , Stephen Molloy , Suresh Devalapalli
发明人： Prajakt Kulkarni , Eddie L. T. Choy , Nidish Ramachandra Kamath , Samir K Gupta , Stephen Molloy , Suresh Devalapalli
IPC分类号： G10H1/00
CPC分类号： G10H1/0066 , G10H7/004
摘要： This disclosure describes techniques for processing audio files that comply with the musical instrument digital interface (MIDI) format. In particular, various tasks associated with MIDI file processing are delegated between software operating on a general purpose processor, firmware associated with a digital signal processor (DSP), and dedicated hardware that is specifically designed for MIDI file processing. Alternatively, a multi-threaded DSP may be used instead of a general purpose processor and the DSP. In one aspect, this disclosure provides a method comprising parsing MIDI files and scheduling MIDI events associated with the MIDI files using a first process, processing the MIDI events using a second process to generate MIDI synthesis parameters, and generating audio samples using a hardware unit based on the synthesis parameters.
摘要翻译：本公开描述了用于处理符合乐器数字接口（MIDI）格式的音频文件的技术。具体而言，与在通用处理器上运行的软件，与数字信号处理器（DSP）相关联的固件以及专门为MIDI文件处理而专门设计的专用硬件之间的任何与MIDI文件处理相关的各种任务被委派。或者，可以使用多线程DSP来代替通用处理器和DSP。在一个方面，本公开提供了一种方法，包括使用第一处理解析MIDI文件和调度与MIDI文件相关联的MIDI事件，使用第二处理来处理MIDI事件以产生MIDI合成参数，以及使用基于硬件单元生成音频样本对合成参数。

3. 发明申请

US20080229920A1 METHOD AND DEVICE FOR GENERATING TRIANGULAR WAVES 失效
标题翻译：用于产生三角波的方法和装置
公开(公告)号：US20080229920A1
公开(公告)日：2008-09-25
申请号：US12042190
申请日：2008-03-04
申请人： Stephen Molloy , Suresh Devalapalli , Nidish Ramachandra Kamath
发明人： Stephen Molloy , Suresh Devalapalli , Nidish Ramachandra Kamath
IPC分类号： G10H7/00
CPC分类号： G10H7/12 , G10H2210/205 , G10H2210/211
摘要： This disclosure describes techniques for generating a set of data points that form a triangular wave having a desired gain and a desired frequency. In one example, the method includes the step of (a) determining an increment value based on the desired frequency and the desired gain of the triangular wave. The method further includes the step of (b) adding the increment value to a current data point to generate a next data point, the current data point and the next data point forming a subset of the set of data points. The method further includes the step of iteratively performing (a) and (b) to generate the set of data points that form the triangular wave.
摘要翻译：本公开描述了用于生成形成具有期望增益和期望频率的三角波的数据点集合的技术。在一个示例中，该方法包括以下步骤：（a）基于期望频率和三角波的期望增益来确定增量值。该方法还包括以下步骤：（b）将增量值添加到当前数据点以产生下一个数据点，当前数据点和下一个数据点，形成该组数据点的子集。该方法还包括迭代执行（a）和（b）以产生形成三角波的数据点集合的步骤。

4. 发明授权

US07687703B2 Method and device for generating triangular waves 失效
标题翻译：用于产生三角波的方法和装置
公开(公告)号：US07687703B2
公开(公告)日：2010-03-30
申请号：US12042190
申请日：2008-03-04
申请人： Stephen Molloy , Suresh Devalapalli , Nidish Ramachandra Kamath
发明人： Stephen Molloy , Suresh Devalapalli , Nidish Ramachandra Kamath
IPC分类号： H03K4/06 , G10H1/00
CPC分类号： G10H7/12 , G10H2210/205 , G10H2210/211
摘要： This disclosure describes techniques for generating a set of data points that form a triangular wave having a desired gain and a desired frequency. In one example, the method includes the step of (a) determining an increment value based on the desired frequency and the desired gain of the triangular wave. The method further includes the step of (b) adding the increment value to a current data point to generate a next data point, the current data point and the next data point forming a subset of the set of data points. The method further includes the step of iteratively performing (a) and (b) to generate the set of data points that form the triangular wave.
摘要翻译：本公开描述了用于生成形成具有期望增益和期望频率的三角波的数据点集合的技术。在一个示例中，该方法包括以下步骤：（a）基于期望频率和三角波的期望增益来确定增量值。该方法还包括以下步骤：（b）将增量值添加到当前数据点以产生下一个数据点，当前数据点和下一个数据点，形成该组数据点的子集。该方法还包括迭代执行（a）和（b）以产生形成三角波的数据点集合的步骤。

5. 发明授权

US07678986B2 Musical instrument digital interface hardware instructions 失效
标题翻译：乐器数字接口硬件指令
公开(公告)号：US07678986B2
公开(公告)日：2010-03-16
申请号：US12042146
申请日：2008-03-04
申请人： Suresh Devalapalli , Prajakt Kulkarni , Nidish Ramachandra Kamath
发明人： Suresh Devalapalli , Prajakt Kulkarni , Nidish Ramachandra Kamath
IPC分类号： G10H1/00
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.
摘要翻译：描述了使用专门用于生成MIDI语音的数字波形的一组机器码指令来产生用于乐器数字接口（MIDI）语音的数字波形的技术。例如，处理器可以执行产生MIDI语音的数字波形的软件程序。软件程序的指令可以是专门用于生成用于MIDI语音的数字波形的指令集的机器码指令。特别地，指令之一的执行可以涉及基于定义MIDI语音和所选择的操作的执行的一组参数来选择操作。

6. 发明授权

US07663051B2 Audio processing hardware elements 失效
标题翻译：音频处理硬件元素
公开(公告)号：US07663051B2
公开(公告)日：2010-02-16
申请号：US12042181
申请日：2008-03-04
申请人： Nidish Kamath , Eddie L. T. Choy , Prajakt Kulkarni , Samir K Gupta , Stephen Molloy , Suresh Devalapalli
发明人： Nidish Kamath , Eddie L. T. Choy , Prajakt Kulkarni , Samir K Gupta , Stephen Molloy , Suresh Devalapalli
IPC分类号： G10H1/00
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.
摘要翻译：本公开描述了利用多个硬件元件的技术，该多个硬件元件同时工作来服务从诸如乐器数字接口（MIDI）文件的一个或多个音频文件生成的合成参数。在一个示例中，一种方法包括存储为音频帧的一个或多个音频文件生成的音频合成参数，使用硬件单元的第一音频处理元件处理第一音频合成参数以产生第一音频信息，处理第二音频合成参数，使用所述硬件单元的第二音频处理元件来产生第二音频信息，以及至少部分地基于所述第一和第二音频信息的组合来生成所述音频帧的音频样本。

7. 发明申请

US20090205480A1 SYSTEMS AND METHODS FOR PROVIDING VARIABLE ROOT NOTE SUPPORT IN AN AUDIO PLAYER 失效
标题翻译：用于提供可变根的系统和方法注意支持音频播放器
公开(公告)号：US20090205480A1
公开(公告)日：2009-08-20
申请号：US12358030
申请日：2009-01-22
申请人： Prajakt Kulkarni , Suresh Devalapalli
发明人： Prajakt Kulkarni , Suresh Devalapalli
IPC分类号： G10H7/00
CPC分类号： G10H1/0075 , G10H7/02 , G10H2240/021 , G10H2240/145
摘要： A method for providing variable root note support in an audio player is described. A file with Musical Instrument Digital Interface (MIDI) data and a set of user defined instruments is received. A metric is determined using a user defined root note in the user defined instruments, a key number for a MIDI note in the MIDI data, and a player specific root note. The key number is adjusted based on the metric.
摘要翻译：描述了在音频播放器中提供可变根音支持的方法。收到带有乐器数字接口（MIDI）数据和一组用户定义乐器的文件。使用用户定义的乐器中的用户定义的根音来确定度量，MIDI数据中的MIDI音符的键号和播放器的特定根音。密钥号码根据度量进行调整。

8. 发明申请

US20080229911A1 WAVEFORM FETCH UNIT FOR PROCESSING AUDIO FILES 有权
标题翻译：用于处理音频文件的波形FETCH单元
公开(公告)号：US20080229911A1
公开(公告)日：2008-09-25
申请号：US12041834
申请日：2008-03-04
申请人： Nidish Ramachandra Kamath , Prajakt V. Kulkarni , Samir Kumar Gupta , Stephen Molloy , Suresh Devalapalli , Allister Alemania
发明人： Nidish Ramachandra Kamath , Prajakt V. Kulkarni , Samir Kumar Gupta , Stephen Molloy , Suresh Devalapalli , Allister Alemania
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.
摘要翻译：本公开描述了利用波形获取单元的技术，其操作以代表同时操作的多个硬件处理元件中的每一个来检索波形采样，以服务从一个或多个音频文件（例如乐器）生成的各种音频合成参数数字接口（MIDI）文件。在一个示例中，一种方法包括从音频处理元件接收对波形样本的请求，并且通过基于包含在请求中的相位增量和音频合成参数控制来计算所请求的波形样本的波形采样数来为该请求提供服务与所请求的波形样本相关联的单词，使用波形采样号从本地高速缓存中检索波形采样，以及将检索的波形样本发送到请求音频处理单元。

9. 发明授权

US08185381B2 Unified filter bank for performing signal conversions 有权
标题翻译：用于执行信号转换的统一滤波器组
公开(公告)号：US08185381B2
公开(公告)日：2012-05-22
申请号：US12174498
申请日：2008-07-16
申请人： Sang-Uk Ryu , Eddie L. T. Choy , Nidish Ramachandra Kamath , Samir Kumar Gupta , Suresh Devalapalli
发明人： Sang-Uk Ryu , Eddie L. T. Choy , Nidish Ramachandra Kamath , Samir Kumar Gupta , Suresh Devalapalli
IPC分类号： G10L11/00 , G10L19/00 , G09G5/00 , H04H20/71 , H04L27/10 , H04J3/00 , H04K1/02
CPC分类号： G10L19/16 , G10L19/0212
摘要： A unified filter bank for performing signal conversions may include an interface that receives signal conversion commands in relation to multiple types of compressed audio bitstreams. The unified filter bank may also include a reconfigurable transform component that performs a transform as part of signal conversion for the multiple types of compressed audio bitstreams. The unified filter bank may also include complementary modules that perform complementary processing as part of the signal conversion for the multiple types of compressed audio bitstreams. The unified filter bank may also include an interface command controller that controls the configuration of the reconfigurable transform component and the complementary modules.
摘要翻译：用于执行信号转换的统一滤波器组可以包括接收关于多种类型的压缩音频位流的信号转换命令的接口。统一的滤波器组还可以包括可重新配置的变换组件，其执行作为多种类型的压缩音频位流的信号转换的一部分的变换。统一的滤波器组还可以包括作为多种类型的压缩音频比特流的信号转换的一部分执行补充处理的互补模块。统一的滤波器组还可以包括控制可重构变换组件和互补模块的配置的接口命令控制器。

10. 发明授权

US07807915B2 Bandwidth control for retrieval of reference waveforms in an audio device 有权
标题翻译：用于检索音频设备中参考波形的带宽控制
公开(公告)号：US07807915B2
公开(公告)日：2010-10-05
申请号：US12041871
申请日：2008-03-04
申请人： Prajakt Kulkarni , Suresh Devalapalli
发明人： Prajakt Kulkarni , Suresh Devalapalli
IPC分类号： G10H7/00
CPC分类号： G10H1/22 , G10H1/183 , G10H7/004 , G10H2230/021 , G10H2230/041
摘要： In general, the techniques of this disclosure may be used to control utilization of bandwidth allocated to an audio processing module. For example, to process various audio synthesis parameters, the audio processing module may retrieve reference waveform samples for use in generating audio information for voices within an audio frame, such as a MIDI frame. In some cases, the amount of bandwidth available for retrieving the reference waveforms from memory is limited. To manage the utilization of the allocated bandwidth a bandwidth control module estimates an amount of bandwidth required to retrieve reference waveforms for all the voices of the audio frame, and selects one or more voices to be eliminated from generated audio information when the bandwidth estimate exceeds the allocated bandwidth.
摘要翻译：通常，本公开的技术可以用于控制分配给音频处理模块的带宽的利用。例如，为了处理各种音频合成参数，音频处理模块可以检索参考波形样本，以用于生成诸如MIDI帧之类的音频帧内的语音的音频信息。在某些情况下，可用于从存储器检索参考波形的带宽量受到限制。为了管理所分配的带宽的利用率，带宽控制模块估计为音频帧的所有语音检索参考波形所需的带宽量，并且当带宽估计超过该频带估计值时，从所生成的音频信息中选择要消除的一个或多个语音分配带宽。

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