摘要:
The present invention relates to a method and a media system of/for generation of at least one output signal (HPL, (HPR) from at least one input signal from a second set of sound signals (M) having a related second set of Head Related Transfer Functions. The media system can be a TV, a CD player, a DVD player, a Radio, a display, an amplifier, a headphone or a VCR. Said method includes the steps of determining, for each signal in the second set of sound signals, a weighted relation (14) comprising at least one signal from a third set of intermediate sound signals (CHI1, CHI2) and at least one weight value (Weights); determining a first set of Head Related Transfer Functions (HRTFs) based on the second set of sound signals, the second set of Head Related Transfer Functions and the weighted relation; and transferring at least one signal from the third set of intermediate sound signals by means of at least one HRTF from said first set of Head Related Transfer Functions in order to generate at least one output signal belonging to said first set of sound signals. Hereby, in the end, fewer HRTFs are determined for a subsequent transfer of input signal(s) to output signal(s). Accordingly few convolutions are required.
摘要:
An audio system comprises a post-processor (12) arranged to alter successive fragments of a decoded audio signal (14) to provide successive fragments of post-processed audio signal (16). A masking threshold generator (20) provides an estimate of a masking threshold ( ) for successive fragments of post-processed audio signal (16). A noise level generator (17) provides an estimate of a noise level ( ) for successive fragments of the post-processed audio signal (16). A distortion generator (17) determines a degree (D) to which the noise level exceeds the masking threshold for successive fragments of the post-processed audio signal (16). A regulator (18) controls the post-processor according to the degree to which the noise levels exceed the masking threshold.
摘要:
The present invention relates to a method for a service provider to distribute an audio signal to a listener. Before delivering the audio signal to the listener, the audio impression of the audio signal is personalized to the listener. The personalizing could e.g. be performed by filtering the audio signal using a set of head related transfer functions (HRTFs) defined by parameters being specific for the listener. This is for minimizing the interest of performing illegal copying of the audio signal. The invention further relates to a method of playing back a distributed audio signal and a playback device for playing back a distributed audio signal, where the personalization is detected and used as a watermark, which is identified and interpreted before playing back the distributed audio.
摘要:
To improve the reproduction of audio signals, the signal components of a selected audio frequency range (1) of an audio signal are concentrated in a narrower audio frequency range (II). This is achieved by detecting first signal components in the first audio frequency range (I), generating second signal components in the second audio frequency range (II), and controlling the amplitude of the second signal components in response to the amplitude of the first signal components. As a result, dedicated transducers may be used which are particularly efficient in the narrower frequency range. The original frequency range (I) may contain the lower frequency signal components (bass components) of the audio signal.
摘要:
The data representation apparatus (100) for representing data by means of an audio signal (o), contains an processing unit (102) arranged to deliver the audio signal (o) with a characteristic (C) dependent on a positionless data variable (p) capable of having a first value (206) and a second value (208), whereby the data representation apparatus (100) comprises a mapping unit (132), arranged to map by means of a mapping the first value (206) of the data variable (p) to a first position (216) in three-dimensional space, and the second value (208) of the data variable (p) to a second position (218) in three-dimensional space, and the audio processing unit (102) is arranged to change the characteristic (C), resulting in the audio signal appearing to originate from the first position (216) for the data variable (p) having the first value (206) respectively the second position (218) for the data variable (p) having the second value (208), to a user (200) listening to the audio signal (o). A system containing such a data representation apparatus (100) and a source of data, a source of music and a sound production is also described, as well as a method.
摘要:
The audio reproduction apparatus comprises a cost input for inputting a mathematical cost derived from a measurement, which measurement is user-influenceable and a conditioning unit, capable of delivering an output audio signal in dependence of the mathematical cost, characterized in that the conditioning unit comprises an audio processing means arranged to process an input audio signal to derive the output audio signal with a reproduction quality in dependence of the mathematical cost. As a reproduction quality the position of a virtual sound source and the quality of a stereo signal are also possible. A system comprising the audio reproduction apparatus, a measurement device and a sound production device and a method of to deriving the output audio signal with a reproduction quality in dependence of the mathematical cost are also presented.
摘要:
A device (1) is arranged for adjusting the amplitude of an audio signal (x) such that the output of a transducer (2) coupled to the device is equivalent to the output of a reference transducer. The device comprises a first simulation unit (11) for producing a reference signal (y) in response to the audio signal (x), a second simulation unit (12) for producing a further signal (z) in response the audio signal (x), and comparator means (15) for comparing the reference signal (y) and the further signal (z) so as to produce an adjustment signal (a) which is fed to an adjustment unit (10). The first simulation unit (11) simulates the response of a reference transducer, while the second simulation unit (12) simulates the response of the actual transducer (2) to the audio signal (x).
摘要:
A sound recording and reproduction system comprises ear microphones for recording sound and sound reproduction means for generating sound and means to control the sound signal generated by said sound reproduction means. The system comprises storing device (2) for storing sound signals recorded by the microphones (M_R,M_L), and an input (24) for reproduction of a recorded sound signal (S3) on the means for generating sound (LS_R,LS_L) through an adaptive filter (21). The system comprising a feed back system (25) comprising the input (24), the adaptive filter (21), at least an ear microphone (M_R,M_L), at least one sound reproduction means (LS_R,LS_L) and a comparison means (22) for comparing an input signal (S3) to a signal received by the microphone (S6) upon during reproduction of said input signal (S3), said comparison means (22) providing a comparison signal (e) for regulating the adaptive filter (21).
摘要:
A physiological measurement device (10) that concurrently measures a physiological state of an individual and determines an identity of the individual includes at least a measurement component (12), an identification component (14), and processing component (16). The measurement component (12) measures the physiological state of the individual, and the identification component (14) concurrently determines the identity of the individual. The processing component (16) associates the physiological state of the individual with the identity of the individual.
摘要:
Mobile device having a sound generating means and a display. The mobile device (1) comprises a display (2) with means (3) for acoustically exciting the display or a part of the display. In order to increase the sound volume, particularly at low frequencies, the mobile device is arranged such that when the mobile device is positioned on a table top as defined in this application, the sound volume at a frequency between 0.5 kHz and 1.5 kHz at a 1 meter's distance from the mobile device is increased by at least 6 dB as compared to the same device when used in air.