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    • 2. 发明申请
    • A PARALLEL ARRANGED LINEAR AMPLIFIER AND DC-DC CONVERTER
    • 并联线性放大器和直流 - 直流转换器
    • WO2006111892A3
    • 2007-01-11
    • PCT/IB2006051136
    • 2006-04-12
    • KONINKL PHILIPS ELECTRONICS NVBLANKEN PIETER GMOORE PAUL ANTHONYREEFMAN DERKMINNIS BRIAN
    • BLANKEN PIETER GMOORE PAUL ANTHONYREEFMAN DERKMINNIS BRIAN
    • H03F3/217
    • H03F3/211H03F3/217H03F2200/432
    • A power supply system comprises a parallel arrangement of a linear amplifier (LA) and a DC-DC converter (CO). The linear amplifier (LA) has an amplifier output to supply a first current (II) to the load (LO). The DC-DC converter (CO) comprises: a converter output for supplying a second current (12) to the load (LO), a first inductor (Ll), and a switch (SC) coupled to the first inductor (Ll) for generating a current in the first inductor (Ll), and a low-pass filter (FI) arranged between the first inductor (Ll) and the load (LO). The low pass filter (FI) comprises a first capacitor (Cl; CA) which has a first terminal coupled to the switch (SC) an a second terminal coupled to a reference voltage level (GND), and a second inductor (L2; LC) which has a first terminal coupled to the first inductor (Ll) and a second terminal coupled to the load (LO). The low-pass filter further comprises, either: (i) a series arrangement of a second capacitor (C2) and a damping resistor (R2), which series arrangement is arranged in parallel with the first capacitor (Cl), or (ii) a parallel arrangement of a third capacitor (CB) and a damping resistor (RB) arranged in series with the first capacitor (CA), or (iii) a series arrangement of a third inductor (L3) and a damping resistor (R3), which series arrangement is arranged in parallel with the second inductor (L2), or (iv) a parallel arrangement of a fourth inductor (LD) and a damping resistor (RD), which parallel arrangement is arranged in series with the second inductor (LC).
    • 电源系统包括线性放大器(LA)和DC-DC转换器(CO)的并行布置。 线性放大器(LA)具有放大器输出以向负载(LO)提供第一电流(II)。 DC-DC转换器(CO)包括:用于向负载(LO)提供第二电流(12)的转换器输出,耦合到第一电感器(L1)的第一电感器(L1)和开关(SC),用于 在第一电感器(L1)中产生电流,以及布置在第一电感器(L1)和负载(LO)之间的低通滤波器(FI)。 低通滤波器(FI)包括第一电容器(C1; CA),其具有耦合到开关(SC)的第一端子,耦合到参考电压电平(GND)的第二端子和第二电感器(L2; LC ),其具有耦合到第一电感器(L1)的第一端子和耦合到负载(LO)的第二端子。 低通滤波器还包括:(i)第二电容器(C2)和阻尼电阻器(R2)的串联布置,该串联装置与第一电容器(C1)并联布置,或(ii) 与第一电容器(CA)串联布置的第三电容器(CB)和阻尼电阻器(RB)的并联布置,或(iii)第三电感器(L3)和阻尼电阻器(R3)的串联布置, 该串联装置与第二电感器(L2)并联布置,或(iv)第四电感器(LD)和阻尼电阻器(RD)的并联布置,该并联装置与第二电感器(LC)串联布置 )。
    • 5. 发明申请
    • DIRECT STREAM DIGITAL AUDIO WITH MINIMAL STORAGE REQUIREMENT
    • 具有最低存储要求的直播流数字音频
    • WO2006129215A2
    • 2006-12-07
    • PCT/IB2006051537
    • 2006-05-16
    • KONINKL PHILIPS ELECTRONICS NVJANSSEN ERWINREEFMAN DERK
    • JANSSEN ERWINREEFMAN DERK
    • G11B20/10G10L19/16G11B20/12H03M7/00
    • H03M7/3006G10L19/167G11B20/10481G11B20/10527G11B20/1262G11B2020/00014G11B2020/00065G11B2020/10546G11B2020/1288G11B2220/2541G11B2220/2579H03M7/3028
    • An audio coding scheme allowing PCM signal to lossless DSD signal expansion for next generation optical disc formats. The method of encoding an input DSD signal includes up-sampling a corresponding PCM signal to the DSD sample rate. Then a set of loop filter parameters for a noise-shaping loop of a sigma-delta modulator are generated, either using a random starting condition of the sigma-delta modulator or including synchronization parameters. This will allow a decoder to regenerate an almost perfect signal, but still it needs a correction signal to be able to bit identically regenerate the DSD input signal. Therefore, a correction signal is generated based on a difference between a sigma- delta modulated version of the up-sampled PCM signal and the input DSD signal, wherein the sigma-delta modulated version of the up-sampled PCM signal is obtained using the set of loop filter parameters. The correction signal may be adapted to be applied to the low bit PCM signal, to the up-sampled PCM signal or to the output bit stream. Finally, an expansion bit stream is generated where an encoded version of the set of loop filter parameters and an encoded version of the correction signal are included. The decoder can reproduce the original DSD signal based on the already available PCM signal and the described expansion bit stream. Thus, the coding scheme enables top quality audio with minimal storage overhead since the already available PCM signal is used in combination with an expansion bit stream. Since only an additional data stream is required to be stored on a disc, e.g. as part of an MPEG stream, DSD functionality is added to existing systems without causing compatibility problems.
    • 音频编码方案允许PCM信号用于下一代光盘格式的无损DSD信号扩展。 编码输入DSD信号的方法包括将相应的PCM信号上采样到DSD采样率。 然后,使用Σ-Δ调制器的随机起始条件或包括同步参数来生成Σ-Δ调制器的噪声整形环路的一组环路滤波器参数。 这将允许解码器再生几乎完美的信号,但是仍然需要一个校正信号以能够相同地重新生成DSD输入信号。 因此,基于上采样PCM信号的Σ-Δ调制版本与输入DSD信号之间的差产生校正信号,其中上采样PCM信号的Σ-Δ调制版本使用该集合 的环路滤波器参数。 校正信号可适用于低比特PCM信号,上采样PCM信号或输出比特流。 最后,生成扩展位流,其中包括一组环路滤波器参数的编码版本和校正信号的编码版本。 解码器可以基于已经可用的PCM信号和所描述的扩展位流再现原始DSD信号。 因此,由于已经可用的PCM信号与扩展位流结合使用,所以编码方案实现了具有最小存储开销的顶级质量音频。 由于只需要额外的数据流来存储在盘上,例如, 作为MPEG流的一部分,DSD功能被添加到现有系统中,而不会引起兼容性问题。
    • 7. 发明申请
    • ADAPTIVE FILTERING
    • 自适应滤波
    • WO2004093316A3
    • 2005-01-27
    • PCT/IB2004050452
    • 2004-04-15
    • KONINKL PHILIPS ELECTRONICS NVJANSSEN ERWINREEFMAN DERK
    • JANSSEN ERWINREEFMAN DERK
    • H03H17/02H03H21/00
    • H03H17/0294H03H2017/0295
    • An adaptive filtering device and method where at least one adaptive filter receives an input signal and a metering device receives an output of the at least one adaptive filter, monitors a characteristic of the output, such as power of high-frequency components, and forwards a correction signal in a feedback loop to adjust the characteristic of the at least one filter in order to change the characteristic of the output. An adaptive filtering device (200) and method where two low-pass FIR filters (202, 204) receive an input signal, a weighted adder (206) receives outputs from the two low-pass FIR filters and changes a weighting of each to produce filtered output data, and a controller (208) that receives a cut­off frequency (203), supplies the cut-off frequency to the two low-pass FIR filters, and supplies a signal to the weighted adder for varying the weighting of each of the low-pass FIR filters to switch therebetween.
    • 一种自适应滤波装置和方法,其中至少一个自适应滤波器接收输入信号,并且计量装置接收所述至少一个自适应滤波器的输出,监视输出的特性,例如高频分量的功率,并转发 校正信号,以调整至少一个滤波器的特性,以改变输出的特性。 一种自适应滤波装置(200)和方法,其中两个低通FIR滤波器(202,204)接收输入信号,加权加法器(206)接收来自两个低通FIR滤波器的输出并改变每个低通FIR滤波器的加权以产生 滤波后的输出数据和接收截止频率(203)的控制器(208)将截止频率提供给两个低通FIR滤波器,并将信号提供给加权加法器,以改变每个 低通FIR滤波器在其间切换。
    • 8. 发明申请
    • SIGMA-DELTA MODULATOR
    • SIGMA-DELTA调制器
    • WO2004093324A8
    • 2004-12-29
    • PCT/IB2004050424
    • 2004-04-13
    • KONINKL PHILIPS ELECTRONICS NVJANSSEN ERWINREEFMAN DERK
    • JANSSEN ERWINREEFMAN DERK
    • H03M3/02H03M7/32H03M3/00
    • H03M7/3035H03M3/43H03M3/444H03M3/452H03M3/454H03M7/3028H03M7/3037H03M7/304
    • A sigma-delta modulator (SDM) including n (n>=1) integrators in series, where a first of the n integrators receiving an input signal, at least one Q device, which acts as a quantizer when an absolute value of a signal input thereto is smaller and as a gain element (either with or without offset) when the absolute value of the signal input thereto is larger, and a device for quantizing an output of the unit. The SDM may be a feed back or feed forward SDM. The SDM may include a single or multiple Q devices. The single Q device may be positioned so that the signal input to the one Q device is an output of the last integrator and the output of the one device Ql is input to the device for quantizing and/or to the n integrators. For multiple Q devices, each of the Q devices may have different parameters set to improve stability, improve SNR, and/or reduce introduction of artifacts. The SDM may be part of an analog to digital converter and/or a digital to digital converter. The SDM may process digital or analog signals, for example, a 1-bit signal.
    • 包括串联的n(n> = 1)积分器的Σ-Δ调制器(SDM),其中接收输入信号的n个积分器中的第一个,至少一个Q器件,当信号的绝对值作为量化器时 当输入的信号的绝对值较大时,其输入较小,并且作为增益元件(有或没有偏移),以及用于量化该单元的输出的装置。 SDM可以是反馈或前馈SDM。 SDM可以包括单个或多个Q设备。 单个Q器件可以被定位成使得输入到一个Q器件的信号是最后一个积分器的输出,并且一个器件Q1的输出被输入到用于量化的器件和/或n个积分器。 对于多个Q设备,每个Q设备可以具有不同的参数来设置以提高稳定性,改善SNR,和/或减少伪像的引入。 SDM可以是模数转换器和/或数模转换器的一部分。 SDM可以处理数字或模拟信号,例如1位信号。