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    • 63. 发明授权
    • Switching power supply without switching induced spike voltages
    • 开关电源没有开关感应尖峰电压
    • US5448465A
    • 1995-09-05
    • US111729
    • 1993-08-25
    • Koji YoshidaNobuyoshi NagagataTakuya Ishii
    • Koji YoshidaNobuyoshi NagagataTakuya Ishii
    • H02M3/335
    • H02M3/33569H02M2001/009
    • A switching power supply supplies a regulated output voltage and suppresses spike voltage and spike current generated by a switching action of transformers, and suppresses switching frequency drift due to load variation. Output stability of multi-output design is improved and recovery of rectifying diodes by a current resonance are suppressed. A reduction of noise interference to electronic equipments and power loss in the switching power supply itself results. A series connection of a primary winding of a first transformer and a first switching means, which repeats an on/off action is connected across a d-c power source. A series connection of a second switching means, which repeats an on/off action alternately with the first switching means, and a first capacitor is connected in parallel with the primary winding of the first transformer. A series connection of a primary winding of the second transformer and a second capacitor is connected in parallel with the second switching means. Regulated d-c outputs are taken out from each secondary winding of the transformers through rectifiers/filters. A control circuit supplies on/off signals, which on/off-ratios are varied according to one of the regulated d-c outputs, to the first and the second switching means.
    • 开关电源提供稳定的输出电压,并抑制由变压器的开关动作产生的尖峰电压和尖峰电流,并抑制由于负载变化引起的开关频率漂移。 多输出设计的输出稳定性得到改善,并且抑制了通过电流谐振的整流二极管的恢复。 降低对电子设备的噪声干扰和开关电源本身的功率损耗。 第一变压器的初级绕组和重复开/关动作的第一开关装置的串联连接跨d-c电源连接。 与第一开关装置交替地重复开/关动作的第二开关装置和第一电容器的串联连接与第一变压器的初级绕组并联连接。 第二变压器的初级绕组和第二电容器的串联连接与第二开关装置并联连接。 通过整流器/滤波器从变压器的每个次级绕组中取出调节的d-c输出。 控制电路将开/关信号根据调节的d-c输出之一提供,该开/关信号变化到第一和第二开关装置。
    • 69. 发明授权
    • Stereo encoding device, stereo decoding device, and stereo encoding method
    • 立体声编码装置,立体声解码装置和立体声编码方法
    • US08457319B2
    • 2013-06-04
    • US12064995
    • 2006-08-30
    • Chun Woei TeoSua Hong NeoKoji YoshidaMichiyo Goto
    • Chun Woei TeoSua Hong NeoKoji YoshidaMichiyo Goto
    • H04H20/88
    • G10L19/24G10L19/008
    • There is disclosed a stereo encoding device capable of accurately encoding a stereo signal at a low bit rate and suppressing delay in audio communication. The device performs monaural encoding in its first layer (110). In a second layer (120), a filtering unit (103) generates an LPC (Linear Predictive Coding) coefficient and generates a left channel drive sound source signal. A time region evaluation unit (104) and a frequency region evaluation unit (105) perform signal evaluation and prediction in both of their regions. A residual encoding unit (106) encodes a residual signal. A bit distribution control unit (107) adaptively distributes bits to the time region evaluation unit (104), the frequency region evaluation unit (105), and the residual encoding unit (106) according to a condition of the audio signal.
    • 公开了一种能够以低比特率精确地编码立体声信号并抑制音频通信中的延迟的立体声编码装置。 设备在其第一层(110)中执行单声道编码。 在第二层(120)中,滤波单元(103)产生LPC(线性预测编码)系数并产生左声道驱动声源信号。 时间区域评估单元(104)和频率区域评估单元(105)在它们的两个区域中执行信号评估和预测。 残差编码单元(106)对剩余信号进行编码。 根据音频信号的条件,位分配控制单元(107)自适应地将时间区域评估单元(104),频率区域评估单元(105)和残差编码单元(106)分配。
    • 70. 发明授权
    • Fixed codebook searching apparatus and fixed codebook searching method
    • 固定码本搜索装置和固定码本搜索方法
    • US08452590B2
    • 2013-05-28
    • US13093294
    • 2011-04-25
    • Hiroyuki EharaKoji Yoshida
    • Hiroyuki EharaKoji Yoshida
    • G10L19/22
    • G10L19/107
    • A fixed codebook searching apparatus, includes a convolution operator, implemented by at least one processor, that convolves an impulse response of a perceptually weighted synthesis filter with an impulse response vector that has values at negative times, to generate a second impulse response vector that has values at negative times. A matrix generator, implemented by at least one processor, generates a Toeplitz-type convolution matrix using the second impulse response vector generated by the convolution operator. A searcher, implemented by at least one processor, performs a codebook search by maximizing a term using the Toeplitz-type convolution matrix.
    • 一种固定码本搜索装置,包括由至少一个处理器实现的卷积运算符,其将感知加权的合成滤波器的脉冲响应与具有负时间的值的脉冲响应向量卷积,以产生具有 值在负时间。 由至少一个处理器实现的矩阵生成器使用由卷积算子产生的第二脉冲响应向量生成Toeplitz型卷积矩阵。 由至少一个处理器实现的搜索器通过使用Toeplitz型卷积矩阵最大化一个项来执行码本搜索。