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1. 发明授权

US6009179A Method and apparatus for electronically embedding directional cues in two channels of sound 失效
公开(公告)号：US6009179A
公开(公告)日：1999-12-28
申请号：US787705
申请日：1997-01-24
申请人： Paul Nigel Wood , Laura Mercs , Paul Embree
发明人： Paul Nigel Wood , Laura Mercs , Paul Embree
IPC分类号： H04R5/033 , H04S3/00 , H04R5/00
CPC分类号： H04S3/00 , H04R5/033 , H04S2400/01 , H04S2420/01
摘要： The system and method of the present invention provides surround sound effects through a two channel system. In one embodiment, the first channel is connected to one speaker (e.g., the right speaker) of a headset and the second channel is connected to the other speaker (e.g., the left speaker) of the headset. Thus, surround sound effects, including providing effects to distinguish front and rear sound sources, are provided through headsets which isolate the sound provided to right ear and the left ear of the listener. Alternately, the signals are output to a two speaker system, enabling surround sound effects to be output through home stereo systems not necessarily configured specifically for surround sound. Modified head related transfer functions (HRTF) are applied to each rear sound signal. The modified HRTF for each rear signal is generated by removing the head related transfer function corresponding to the front center signal from the HRTF corresponding to the rear sound signal. This provides the audible effect of distinguishing more clearly sounds originating in front of the listener or to the rear of the listener while not limiting the perceived bandwidth of the signal.

2. 发明授权

US6002775A Method and apparatus for electronically embedding directional cues in two channels of sound 有权
标题翻译：将方向线索电子嵌入两声道的方法和装置
公开(公告)号：US6002775A
公开(公告)日：1999-12-14
申请号：US134503
申请日：1998-08-14
申请人： Paul Nigel Wood , Laura Mercs , Paul Embree
发明人： Paul Nigel Wood , Laura Mercs , Paul Embree
IPC分类号： H04R5/033 , H04S3/00 , H04R5/00
CPC分类号： H04S3/00 , H04R5/033 , H04S2400/01 , H04S2420/01
摘要： The system and method of the present invention provides surround sound effects through a two channel system. In one embodiment, the first channel is connected to one speaker (e.g., the right speaker) of a headset and the second channel is connected to the other speaker (e.g., the left speaker) of the headset. Thus, surround sound effects, including providing effects to distinguish front and rear sound sources, are provided through headsets which isolate the sound provided to right ear and the left ear of the listener. Alternately, the signals are output to a two speaker system, enabling surround sound effects to be output through home stereo systems not necessarily configured specifically for surround sound. Modified head related transfer functions (HRTF) are applied to each rear sound signal. The modified HRTF for each rear signal is generated by removing the head related transfer function corresponding to the front center signal from the HRTF corresponding to the rear sound signal. This provides the audible effect of distinguishing more clearly sounds originating in front of the listener or to the rear of the listener while not limiting the perceived bandwidth of the signal.
摘要翻译：本发明的系统和方法通过双通道系统提供环绕声效果。在一个实施例中，第一通道连接到耳机的一个扬声器（例如，右扬声器），并且第二通道连接到耳机的另一扬声器（例如，左扬声器）。因此，通过将提供给右耳和收听者的左耳的声音隔离的耳机提供包括提供区分前后声源的效果的环绕声效果。或者，将信号输出到两个扬声器系统，使环绕声效果能够通过不一定专门为环绕声配置的家庭立体声系统输出。修改的头部相关传输函数（HRTF）被应用于每个后部声音信号。通过从对应于后方声音信号的HRTF去除与前方中心信号相对应的头部相关传递函数来生成每个后部信号的修改的HRTF。这提供了在不限制信号的感知带宽的情况下区分来自收听者前方或收听者后方的更清晰的声音的可听见的效果。

3. 发明授权

US5798922A Method and apparatus for electronically embedding directional cues in two channels of sound for interactive applications 失效
标题翻译：用于将交互式应用的方向线索电子嵌入两声道的方法和装置
公开(公告)号：US5798922A
公开(公告)日：1998-08-25
申请号：US788739
申请日：1997-01-24
申请人： Paul Nigel Wood , Laura Mercs , Paul Embree
发明人： Paul Nigel Wood , Laura Mercs , Paul Embree
IPC分类号： H04S1/00 , H04H5/00
CPC分类号： H04S1/007
摘要： A system for providing audible cues that enable a listener to identify locations of origins of sounds. In one embodiment, a front and rear signal are copies of an input signal. The rear signal is modified by application of a modified head related transfer function which is the difference between the front and rear head related transfer functions. Copies are then made of the front signal and the modified rear signal, one copy of each associated with a first channel and one copy of each associated with a second channel. Front/rear cues are applied by delaying one of the rear signals or inverting the phase of one of the rear signals. Volume levels are then modified according to the location of the sound source. Locations of sound sources, including sources location behind the user are therefore audibly distinguished. Thus, in an interactive environment, such as a video game environment, the sounds generated by moving objects can be readily modified by simply modifying the volume levels.
摘要翻译：一种用于提供听觉提示的系统，其使听众能够识别声音起源的位置。在一个实施例中，前和后信号是输入信号的副本。通过应用改变的头相关传递函数修改后信号，该功能是前头与后头相关的传递函数之间的差异。然后将副本由前信号和修改的后信号构成，每个与第一信道相关联的一个副本和每个与第二信道相关联的一个副本。通过延迟后部信号之一或反转其中一个后部信号的相位来应用前/后线索。然后根据声源的位置修改音量。因此，可听见区分声源的位置，包括用户后面的源位置。因此，在诸如视频游戏环境的交互式环境中，通过简单地修改音量级别可以容易地修改由移动对象产生的声音。

4. 发明授权

US6067361A Method and apparatus for two channels of sound having directional cues 失效
公开(公告)号：US6067361A
公开(公告)日：2000-05-23
申请号：US895173
申请日：1997-07-16
申请人： Michael Kohut , James Mercs , Laura Mercs , Paul M. Embree , Paul Nigel Wood
发明人： Michael Kohut , James Mercs , Laura Mercs , Paul M. Embree , Paul Nigel Wood
IPC分类号： H04S1/00 , H04R5/00
CPC分类号： H04S1/005
摘要： The system and method of the present invention provides enhanced surround sound effects. In one embodiment, 90.degree. phase shift and copy of the modified head related transfer functions (HRTF) are applied to each rear sound signal. The modified HRTF for each rear signal is generated by removing the head related transfer function corresponding to the front center signal from the HRTF corresponding to the rear sound signal. This provides the audible effect of distinguishing more clearly sounds originating in front of the listener or to the rear of the listener while not limiting the perceived bandwidth of the signal. The rear signals corresponding to the first channel are inverted. The front and rear signals for each corresponding channel are then combined. The two channels, generated can be stored on media, such as film, and subsequently read and input to a surround sound decoder to generate enhanced surround sound output.

5. 发明授权

US6154545A Method and apparatus for two channels of sound having directional cues 失效
标题翻译：具有方向线索的两声道声道的方法和装置
公开(公告)号：US6154545A
公开(公告)日：2000-11-28
申请号：US133289
申请日：1998-08-12
申请人： Michael Kohut , James Mercs , Laura Mercs , Paul M. Embree , Paul Nigel Wood
发明人： Michael Kohut , James Mercs , Laura Mercs , Paul M. Embree , Paul Nigel Wood
IPC分类号： H04S1/00 , H04K1/00 , H04L9/00
CPC分类号： H04S1/005
摘要： The system and method of the present invention provides enhanced surround sound effects. In one embodiment, 90.degree. phase shift and copy of the modified head related transfer functions (HRTF) are applied to each rear sound signal. The modified HRTF for each rear signal is generated by removing the head related transfer function corresponding to the front center signal from the HRTF corresponding to the rear sound signal. This provides the audible effect of distinguishing more clearly sounds originating in front of the listener or to the rear of the listener while not limiting the perceived bandwidth of the signal. The rear signals corresponding to the first channel are inverted. The front and rear signals for each corresponding channel are then combined. The two channels, generated can be stored on media, such as film, and subsequently read and input to a surround sound decoder to generate enhanced surround sound output.
摘要翻译：本发明的系统和方法提供了增强的环绕声效果。在一个实施例中，将90°相移和修改的头相关传输函数（HRTF）的副本应用于每个后声音信号。通过从对应于后方声音信号的HRTF去除与前方中心信号相对应的头部相关传递函数来生成每个后部信号的修改的HRTF。这提供了在不限制信号的感知带宽的情况下区分来自收听者前方或收听者后方的更清晰的声音的可听见的效果。与第一通道对应的后部信号反转。然后组合每个相应通道的前后信号。生成的两个通道可以存储在诸如胶片的介质上，随后读取和输入到环绕声解码器以产生增强的环绕声输出。

6. 发明授权

US5907623A Audio noise reduction system implemented through digital signal processing 失效
标题翻译：通过数字信号处理实现音频降噪系统
公开(公告)号：US5907623A
公开(公告)日：1999-05-25
申请号：US562287
申请日：1995-11-22
申请人： Laura Mercs , Paul M. Embree
发明人： Laura Mercs , Paul M. Embree
IPC分类号： G11B20/04 , G11B20/24 , H03G9/02 , H03H21/00 , H04B1/64 , H04B15/00
CPC分类号： H03G9/005 , G11B20/24 , H03G9/025 , H04B1/64
摘要： A decoder capable of decoding audio signals encoded using analog noise reduction techniques, particularly Dolby A, is implemented by means of digital signal processing. The encoded signal passes through one or more digital filters, producing the decoded signal. The decoded signal is fed back to drive control blocks, which determine the parameters of the digital filters. The determination of these parameters may be arranged so as to emulate closely a given analog noise reduction decoder, such as a Dolby A decoder. The one or more digital filters are relocated to the feed-forward portion of the decoder--they are located in the feedback portion of the encoder when performed using analog techniques--to overcome the problems caused by delay introduced by the digital implementation which prevent a direct conversion of the analog decoder to a digital one.
摘要翻译：能够解码使用模拟噪声降低技术（特别是杜比A）编码的音频信号的解码器通过数字信号处理来实现。编码信号通过一个或多个数字滤波器，产生解码信号。解码的信号被反馈到驱动控制块，其确定数字滤波器的参数。这些参数的确定可以被布置为紧密地模拟给定的模拟噪声降低解码器，例如杜比A解码器。一个或多个数字滤波器被重新定位到解码器的前馈部分 - 当使用模拟技术执行时它们位于编码器的反馈部分中 - 以克服由数字实现引入的延迟引起的问题，该数字实现阻止直接将模拟解码器转换为数字解码器。

7. 发明授权

US06965804B1 Buffer management system for digital audio 失效
标题翻译：数字音频缓冲管理系统
公开(公告)号：US06965804B1
公开(公告)日：2005-11-15
申请号：US09034254
申请日：1998-03-04
申请人： Laura Mercs , Paul M. Embree , James S. Mercs
发明人： Laura Mercs , Paul M. Embree , James S. Mercs
IPC分类号： G06F17/00 , G11B20/10 , G11B27/10 , H04B1/00
CPC分类号： G11B20/10527 , G11B27/10 , G11B2020/10675 , G11B2020/1074
摘要： A method and apparatus for buffer management for digital audio recording/playback wherein a digital signal processor, memory and appropriate interfacing facilitate storage and retrieval of digital audio data samples continuously across non-contiguous areas of memory to achieve substantially seamless flow of audio, as well as precise fade-in, fade-out and cross-fading between channel events, all as required in such critical synchronizing applications as film dubbing. A GUI interface and recorder controller communication with the processor, memory and a recording media may also be included.
摘要翻译：一种用于数字音频记录/再现的缓冲器管理的方法和装置，其中数字信号处理器，存储器和适当的接口便于在不连续的存储器区域连续地存储和检索数字音频数据样本，以实现基本上无缝的音频流像在电影配音这样的关键同步应用程序中所需要的，在通道事件之间的精确淡入，淡出和交叉衰落。还可以包括与处理器，存储器和记录介质的GUI接口和记录器控制器通信。

8. 发明授权

US06807278B1 Audio noise reduction system implemented through digital signal processing 失效
标题翻译：通过数字信号处理实现音频降噪系统
公开(公告)号：US06807278B1
公开(公告)日：2004-10-19
申请号：US09158674
申请日：1998-09-22
申请人： Laura Mercs , Paul M. Embree
发明人： Laura Mercs , Paul M. Embree
IPC分类号： H04B1500
CPC分类号： H03G9/005 , G11B20/24 , H03G9/025 , H04B1/64
摘要： A decoder capable of decoding audio signals encoded using analog noise reduction techniques, particularly Dolby A, is implemented by means of digital signal processing. The encoded signal passes through one or more digital filters, producing the decoded signal. The decoded signal is fed back to drive control blocks, which determine the parameters of the digital filters. The determination of these parameters may be arranged so as to emulate closely a given analog noise reduction decoder, such as a Dolby A decoder. The one or more digital filters are relocated to the feed-forward portion of the decoder—they are located in the feedback portion of the encoder when performed using analog techniques—to overcome the problems caused by delay introduced by the digital implementation which prevent a direct conversion of the analog decoder to a digital one.
摘要翻译：能够解码使用模拟噪声降低技术（特别是杜比A）编码的音频信号的解码器通过数字信号处理来实现。编码信号通过一个或多个数字滤波器，产生解码信号。解码的信号被反馈到驱动控制块，其确定数字滤波器的参数。这些参数的确定可以被布置为紧密地模拟给定的模拟噪声降低解码器，例如杜比A解码器。一个或多个数字滤波器被重新定位到解码器的前馈部分 - 当使用模拟技术执行时它们位于编码器的反馈部分中 - 以克服由数字实现引入的延迟引起的问题，该数字实现阻止直接将模拟解码器转换为数字解码器。

9. 发明授权

US5910995A DSP decoder for decoding analog SR encoded audio signals 失效
标题翻译： DSP解码器，用于解码模拟SR编码音频信号
公开(公告)号：US5910995A
公开(公告)日：1999-06-08
申请号：US562286
申请日：1995-11-22
申请人： Laura Mercs , Paul M. Embree , Casper W. Barnes
发明人： Laura Mercs , Paul M. Embree , Casper W. Barnes
IPC分类号： G11B20/04 , G11B20/10 , G11B20/24 , H03G9/02 , H03H21/00 , H04B1/64 , H03G7/00
CPC分类号： H03G9/005 , G11B20/10527 , G11B20/24 , H03G9/02 , H03H21/0012 , H04B1/64
摘要： A decoder capable of decoding audio signals encoded using analog noise reduction techniques, particularly Dolby SR, is implemented by means of digital signal processing. The typical decoding paradigm used by analog Dolby SR decoders is modified to overcome the problems caused by delay which is introduced by the digital implementation. A gain factor is factored out of the feedback transfer function and is placed in the forward signal path of each stage of the digital decoder. A single control circuit can then be used to generate coefficients which define transfer functions of each filter stage of the signal path. Linear interpolation techniques are used to limit the number of coefficient entries necessary to emulate the transfer function of an analog Dolby SR decoder. The digital decoder structure can be inverted to produce a digital encoder which is capable of implementing any noise reduction standard desired, including Dolby SR.
摘要翻译：能够解码使用模拟噪声降低技术，特别是杜比SR编码的音频信号的解码器通过数字信号处理来实现。模拟杜比SR解码器使用的典型解码范例被修改，以克服由数字实现引入的延迟引起的问题。增益因子被从反馈传递函数中考虑，并被放置在数字解码器的每个级的前向信号路径中。然后可以使用单个控制电路来产生定义信号路径的每个滤波器级的传递函数的系数。线性插值技术用于限制模拟杜比SR解码器传递函数所需的系数条目数。数字解码器结构可以被反转以产生能够实现包括杜比SR所需的任何降噪标准的数字编码器。

10. 发明授权

US5999906A Sample accurate audio state update 失效
标题翻译：准确的音频状态更新
公开(公告)号：US5999906A
公开(公告)日：1999-12-07
申请号：US34300
申请日：1998-03-04
申请人： Laura Mercs , Paul M. Embree , James S. Mercs
发明人： Laura Mercs , Paul M. Embree , James S. Mercs
IPC分类号： G11B20/10 , G11B27/034 , G11B27/10 , G11B27/30 , G11B27/34 , G11B5/09
CPC分类号： G11B27/10 , G11B20/10527 , G11B27/034 , G11B27/3027 , G11B27/3036 , G11B2020/10592 , G11B2220/20 , G11B27/34
摘要： A method and apparatus for sample accurate parameter update management in digital audio recording/playback wherein a digital signal processor, memory, recording controller, and appropriate interfacing facilitate storage and retrieval of digital audio data samples continuously to achieve substantially seamless flow and sample accurate audio state updated at precisely designated times, all as required in such critical synchronizing applications as film dubbing.
摘要翻译：一种用于数字音频记录/回放中的样本精确参数更新管理的方法和装置，其中数字信号处理器，存储器，记录控制器和适当的接口有助于数字音频数据样本的连续存储和检索，以实现基本上无缝的流和样本精确的音频状态在精确指定的时间更新，全部按照电影配音等关键同步应用程序的要求进行。

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