公开(公告)号：WO0225999A2

公开(公告)日：2002-03-28

申请号：PCT/GB0104055

申请日：2001-09-10

Applicant: CENTRAL RESEARCH LAB LTD ,  SIBBALD ALASTAIR

Inventor： SIBBALD ALASTAIR

IPC: H04R5/033 ,  H04S1/00 ,  H04S7/00 ,  H04S

CPC classification number: H04S7/305 ,  H04S1/005 ,  H04S2420/01

Abstract: A method of audio signal processing for a loudspeaker located close to an ear in use, the method consisting of or including: creating one or more derived signal from an original monophonic input signal, the derived signals being representative of the original signal being scattered by one or more bodies remote from said ear (excluding room boundary reflection or reverberation), combining the derived signal or signals with said input signal to form a combined signal, and feeding the combined signal to said loudspeaker, thereby providing cues for enabling the listener to perceive the source of the sound of the original monophonic input signal to be located remote from said ear.

Abstract translation: 一种用于在使用中靠近耳朵的扬声器的音频信号处理方法，所述方法包括或包括：从原始单声道输入信号产生一个或多个导出信号，所述导出信号代表原始信号被一个 或更多的远离所述耳朵的物体（不包括房间边界反射或混响），将导出的信号或信号与所述输入信号组合以形成组合信号，并将组合的信号馈送到所述扬声器，由此提供线索以使听众能够察觉 原始单声道输入信号的声音源将位于远离所述耳朵的位置。

公开(公告)号：WO0119138A3

公开(公告)日：2001-11-15

申请号：PCT/GB0003393

申请日：2000-09-04

Applicant: CENTRAL RESEARCH LAB LTD ,  PERCY MICHAEL ,  SIBBALD ALASTAIR

Inventor： PERCY MICHAEL ,  SIBBALD ALASTAIR

IPC: H04S5/00 ,  H04S1/00 ,  G10K15/12

CPC classification number: H04S5/00

Abstract: A method of generating a second decorrelated audio signal from a first audio signal, for use in synthesising a 3D sound field, includes: a) deriving from the first signal a first delayed signal; b) multiplying this first delayed signal by a gain factor between zero and minus one to give a first delayed gain-adjusted signal; c) deriving from the first audio signal a second delayed signal, having a different delay time from the first delayed signal; d) multiplying this second delayed signal by a gain factor between zero and plus one (such that the said gain factors sum to zero) to give a second delayed gain-adjusted signal; e) combining said first and said second delayed gain-adjusted signals with the first audio signal to provide a second decorrelated audio signal. The first and second delayed signals are delayed by time periods which change in a substantially random manner.

Abstract translation: 一种从第一音频信号生成用于合成3D声场的第二去相关音频信号的方法包括：a）从第一信号中导出第一延迟信号; b）将该第一延迟信号乘以零与负1之间的增益因子以给出第一延迟增益调整信号; c）从第一音频信号导出具有与第一延迟信号不同的延迟时间的第二延迟信号; d）将该第二延迟信号乘以零与加1之间的增益因子（使得所述增益因子加到零），以产生第二延迟增益调整信号; e）将所述第一和第二延迟增益调整信号与第一音频信号组合以提供第二解相关音频信号。 第一和第二延迟信号被以基本随机的方式改变的时间段延迟。

公开(公告)号：WO1998020707A1

公开(公告)日：1998-05-14

申请号：PCT/GB1997003020

申请日：1997-11-03

Applicant: CENTRAL RESEARCH LABORATORIES LIMITED ,  CLEMOW, Richard, David ,  SIBBALD, Alastair

Inventor： CENTRAL RESEARCH LABORATORIES LIMITED

IPC: H04S01/00

CPC classification number: H04S1/005 ,  H04S1/002

Abstract: The invention is a stereo sound expander which reproduces a realistic sound image in three dimensions. Prior art systems suffered from the disadvantage that the creation of virtual sound sources or loudspeakers gave rise to a tonal change. Attempts to correct the tonal change impaired the accuracy of the virtual sound source. The invention overcomes the problems experienced by prior art systems, by coupling modified and unmodified stereo signals. Thus by not modifying a Head Related Transfer Function (HRTF) for one signal and equalising the HRTF for the other signal, a flattened frequency response is produced with no tonal changes, but with a high degree of spatial accuracy. Resultant output signals may be used to generate binaural signals or can be fed into crosstalk cancellers.

Abstract translation: 本发明是立体声扩音器，其在三维中再现真实的声像。 现有技术的系统遭受虚拟声源或扬声器的产生产生色调变化的缺点。 纠正音调变化的尝试削弱了虚拟声源的准确性。 本发明通过耦合修改和未修改的立体声信号来克服现有技术系统所遇到的问题。 因此，通过不修改一个信号的头相关传递函数（HRTF）并对其他信号的HRTF进行均衡，产生没有色调变化但具有高空间精度的扁平化频率响应。 结果输出信号可用于产生双耳信号或可以馈送到串音消除器。

公开(公告)号：WO1994001833A1

公开(公告)日：1994-01-20

申请号：PCT/GB1993001211

申请日：1993-06-08

Applicant: CENTRAL RESEARCH LABORATORIES LIMITED ,  SIBBALD, Alastair

Inventor： CENTRAL RESEARCH LABORATORIES LIMITED

IPC: G06K07/10

CPC classification number: G06K7/1097

Abstract: An optical transceiver sytem comprises an optical ticket unit (2) and a transceiver unit (18). The ticket unit (2) includes a green LED (10), an ASIC (4) and a spherical lens (12). The transceiver unit (18) includes a red fluorescent plastics plate (20), photodiode means (22) for detecting fluorescence within the plate (20) generated by light received from LED (10). Unit (18) also includes an ASIC (26) for receiving signals from photodiodes (22), and red LEDs (28) incapable of generating fluorescence within plate (20). The ASIC (26) drives LEDs (28) whose optical signals are detected by a photodiode (30), within ASIC (4), travelling via lens (12). The transmitted and received optical signals are representative of communication data.

Abstract translation: 光收发器系统包括光学单元（2）和收发器单元（18）。 票单单元（2）包括绿色LED（10），ASIC（4）和球面透镜（12）。 收发器单元（18）包括红色荧光塑料板（20），用于检测由LED（10）接收的光产生的板（20）内的荧光的光电二极管装置（22）。 单元（18）还包括用于从光电二极管（22）接收信号的ASIC（26）和不能在板（20）内产生荧光的红色LED（28）。 ASIC（26）通过透镜（12）驱动在ASIC（4）内由光电二极管（30）检测其光信号的LED（28）。 发送和接收的光信号代表通信数据。