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    • 1. 发明申请
    • DEVICE AND METHOD FOR CONVERSION INTO A TRANSFORMED REPRESENTATION OR FOR INVERSELY CONVERTING THE TRANSFORMED REPRESENTATION
    • 用于实现变形演示或反演变形演示的装置和方法
    • WO2005006624A3
    • 2005-02-10
    • PCT/EP2004007326
    • 2004-07-05
    • FRAUNHOFER GES FORSCHUNGGEIGER RALFSCHULLER GERALDSPORER THOMAS
    • GEIGER RALFSCHULLER GERALDSPORER THOMAS
    • G06F17/14G10L19/00G10L19/02H04N7/30G06T9/00
    • H04N19/60G06F17/147G10L19/0017G10L19/0212
    • In order to convert a first and second block of discrete values into a transformed representation, the first block is transformed (102) according to a first transformation rule, after which it is rounded (104). The rounded transformed values are subsequently summed up (106) with the second block of original discrete values in order to then process (108) the summation result according to a second transformation rule. The initial values of the transformation are, in turn, rounded (110) using the second transformation rule, and are subsequently subtracted (112) from the original discrete values of the first block of discrete values in order to obtain a block of integer initial values of the transformed representation. By using this multi-dimensional lifting schema, a lossless integer transformation is achieved that, by employing the same transcription rules, can, however, be undone with inverted signs during the summation or subtraction so that an inverse integer transformation can also be achieved. In comparison to dividing a transformation in rotations, a distinctly reduced computational complexity is achieved and an accumulation of approximation errors is avoided.
    • 为了将第一和第二离散值块转换成变换后的表示,第一块根据第一变换规则变换(102),然后取整(104)。 之后,将经过舍入的经变换的值与第二块原始离散值(106)相加,然后根据第二变换法则(108)处理求和结果。 使用第二变换规则的变换的输出值再次被舍入(110),然后从第一离散值块(112)的原始离散值中减去(112)以获得变换后的表示的整数输出值的块。 这种多维提升方案实现了无损整数变换,通过应用相同的变换规则可以撤消整数变换,但是在加法或减法中颠倒了符号,从而也可以实现逆整数变换。 与将变换分解为旋转相反,一方面实现了显着降低的计算复杂度,另一方面避免了近似误差的累积。
    • 6. 发明申请
    • SYSTEM AND METHOD FOR EVALUATING THE QUALITY OF MULTI-CHANNEL AUDIOSIGNALS
    • 用于多声道音频信号质量评估的装置和方法
    • WO0044196A3
    • 2000-10-19
    • PCT/EP9909979
    • 1999-12-15
    • FRAUNHOFER GES FORSCHUNGSPORER THOMASBITTO ROLANDBRANDENBURG KARLHEINZ
    • SPORER THOMASBITTO ROLANDBRANDENBURG KARLHEINZ
    • H04R29/00H04S7/00
    • H04S7/30H04S2420/01
    • The invention relates to a system for evaluating the quality of an audio test signal derived from an audio reference signal by coding and decoding. The audio test signal and the audio reference signal each present a plurality of channels. The system comprises a device (19) for converting the audio reference signal into a first audio reference sum signal at a first reference point (17) and into a second audio reference sum signal at a second reference point (10) and for converting the audio test signal into a first audio test sum signal at the first reference point (17) and into a second audio test sum signal at the second reference point (18). The audio reference sum signals and the audio test sum signals at the first and second reference points (17, 18) consist of an overlay of the corresponding channels which can be emitted by most loudspeakers (11-15) and are weighted by a transmission function (UF11 - UF52) between each loudspeaker and its corresponding reference point. The invention also relates to a device (20) for evaluating the quality of the audio test sum signals by taking into consideration the audio reference sum signals so as to indicate the quality of the audio test signal. The system provided for by the invention makes it possible to take into consideration actual spaces and any number of channels of the audio test signal in an evaluation of the quality of a hearing-adapted coding/decoding method.
    • 对于用于在第一基准点的音频参考信号转换成第一音频参考和信号通过编码得到的音频测试信号的质量评估和音频参考信号,其中所述音频测试信号,并且每一个都包括多个信道的音频参考信号进行解码,包括:装置(19)的装置( 17)和(在第二参考点18的第二音频参考和信号)和(对于在所述第二参考点18)时,音频参考和信号,并在音频测试总和信号的音频测试信号转换成第一音频测试和信号在所述第一参考点17)和(在第二音频测试和信号 第一和第二参考点(17,18)的相应通道(11 - 15)的叠加从所述多个扬声器的可输出与一个相应的传递函数(ÜF11 - ÜF52)加权的各扬声器和entsprech之间 形成用于评估所述音频测试总和信号的质量而采取的音频参考和信号的帐户,以提供所述音频测试信号的质量的指示的参考点是,和装置(20)。 本发明的装置允许真正的房间的考虑和考虑任意数量的其质量归属感调整音频测试信号的信道的要被评估的特定编码/解码方法。
    • 8. 发明申请
    • DEVICE AND METHOD FOR CALCULATING A DISCRETE VALUE OF A COMPONENT IN A LOUDSPEAKER SIGNAL
    • 装置和方法用于计算组件的离散值在信号SPEAKER
    • WO2004103022A3
    • 2005-02-17
    • PCT/EP2004005047
    • 2004-05-11
    • FRAUNHOFER GES FORSCHUNGROEDER THOMASSPORER THOMAS
    • ROEDER THOMASSPORER THOMAS
    • H04R7/00H04S3/00
    • H04S7/30H04S3/002H04S2420/13
    • The aim of the invention is to reduce Doppler artifacts in wave field synthesis due to delay changes from a first point in time to a second point in time. For this purpose, the delay for the first point in time and then the delay for the second point in time is determined (10). A value of an audio signal delayed by the first delay for the actual point in time and a value for the audio signal delayed by the second delay for the actual point in time is determined (14). The first value is weighted with a first weighting coefficient and the mean is taken from the second value by means of a second weighting coefficient (22). The two weighted values are added up (26) in order to obtain a discrete value for the actual point in time of the component in a loudspeaker signal for a loudspeaker due to a virtual source. In this manner, a fade-over from one delay to a subsequent delay can be achieved when a delay present at a later point in time is known, thereby reducing undesired Doppler artifacts.
    • 为了减少在波场合成延迟变化多普勒工件由于延迟的第一时间和所述第二时间点,首先确定从第一点到第二点的时间延迟(10)。 然后,通过对当前时间的第一延迟和由用于当前时间的第二延迟,用于将延迟的音频信号的值的延迟音频信号的值被确定(14)。 然后,所述第一值被加权与第一加权因子和所述第二值被平均与第二权重因子(22),于是,两个加权值加起来(26)的离散值的部件的当前时间中的扬声器信号,用于 得到的扬声器由于虚拟源。 为了从一个延迟到后续延迟的转变与受试者的知识在稍后的时间延迟,从而降低了不希望的伪像多普勒实现。
    • 9. 发明申请
    • DEVICE AND METHOD FOR DETERMINING A PULSE RESPONSE AND DEVICE AND METHOD FOR PLAYING AN AUDIO PIECE
    • 用于确定脉冲响应的装置和方法以及用于提供音频棒的方法和装置
    • WO2004047486A2
    • 2004-06-03
    • PCT/EP0312449
    • 2003-11-06
    • FRAUNHOFER GES FORSCHUNGSPORER THOMASNEUBAUER CHRISTIAN
    • SPORER THOMASNEUBAUER CHRISTIAN
    • H04R29/00H04S7/00H04R5/04
    • H04S7/30H04R29/007H04S2420/13
    • The invention relates to a device, which is provided for determining a pulse response in an environment, inside of which a loudspeaker (10) and a microphone (12) are placed, and which operates while using an audio signal. A device (20) for effecting the spectral coloring of a test signal, which is preferably a pseudo noise signal, operates while using a psychoacoustic masking threshold of the audio signal in order to obtain a colored test signal that is embedded in the audio signal in order to obtain a measurement signal that can be fed to the loudspeaker (10). A device (30, 32) for determining the pulse response preferably carries out a cross-correlation of a reaction signal, which is received from the environment via the microphone, and of the test signal or of the colored test signal. This enables a pulse response of an environment to be determined even while playing an audio piece in order to provide an optimal description of the environment for a wavefield synthesis.
    • 用于确定放置扬声器(10)和麦克风(12)的环境中的脉冲响应的设备通过使用音频信号来操作。 装置(20)用于光谱着色的测试信号,其优选地是一个伪噪声信号,使用所述音频信号的心理声学遮蔽阈值操作,以获得一着色的测试信号被嵌入在音频信号中,以获得测量信号 这是扬声器(10)可以被馈送。 装置(30,32),用于确定脉冲响应优选地执行的通过从环境响应信号和所述测试信号或彩色测试信号的麦克风接收的互相关。 因此,在执行音频片段期间也可以确定环境的脉冲响应,以便为波场合成提供最佳的环境描述。