43 results about "Audio restoration" patented technology

An audio restoration apparatus which restores an audio to be restored having a missing audio part and being included in a mixed audio. The audio restoration apparatus includes: a mixed audio separation unit which extracts the audio to be restored included in the mixed audio; an audio structure analysis unit which generates at least one of a phoneme sequence, a character sequence and a musical note sequence of the missing audio part in the extracted audio to be restored, based on an audio structure knowledge database in which semantics of audio are registered; an unchanged audio characteristic domain analysis unit which segments the extracted audio to be restored into time domains in each of which an audio characteristic remains unchanged; an audio characteristic extraction unit which identifies a time domain where the missing audio part is located, from among the segmented time domains, and extract audio characteristics of the identified time domain in the audio to be restored; and an audio restoration unit which restores the missing audio part in the audio to be restored, using the extracted audio characteristics and the generated one or more of phoneme sequence, character sequence and musical note sequence.

An audio recovery circuit is supplied with a video clock VCK that synchronizes with a video clock of a sending side recovered according to a frame synchronizing signal generated based on an incoming stream. The audio recovery circuit includes a PLL circuit for multiplying and dividing VCK to generate an audio master clock MCK, a counting circuit for counting the number of MCKs in one frame, and a cycle adjusting circuit for generating an audio bit clock BCK from a specified number of MCKs. The cycle adjusting circuit adjusts a cycle of BCK in a unit of MCK so that the number of clocks corresponds with the number of samples, according to the number of audio samples to be sent and the number of current MCK.

The invention discloses a device eliminating interference of a television on a speech recognition device, which comprises an audio receiver connected with the audio output end of the television, an HDMI audio and video separator connected with the HDMI audio and video output end of a set top box of the television, a video output unit, a first audio output unit, an audio selector, an echo elimination unit, a speech enhancement and noise reduction unit, an audio acquisition unit, a second audio output unit, and a playback module, wherein the echo elimination unit is connected with the audio selector, the audio acquisition unit and the speech enhancement and noise reduction unit; and the audio selector is connected with the HDMI audio and video separator and the audio receiver. Technologies such as television audio signal introduction, HDMI audio and video separation, television video restoration, television audio restoration, audio selection, echo elimination, speech enhancement and noise reduction and audio acquisition are combined together, a new technical scheme in which the television and an intelligent speech device can be used at the same time is formed, and the problem that the television and the intelligent speech device can be used at the same time can be solved.

A digital IF demodulator includes an analog-to-digital (A/D) converter that receives an analog IF signal and converts it to a digital IF signal. A parallel multiplier then down-converts the digital IF signal to a baseband signal having a video component and an audio component. The frequency down-conversion uses a parallel multiplier driven by an outer feedback loop that corrects gross frequency errors in said digital IF signal. The digital IF demodulator also includes a video recovery circuit that selects the video component from the baseband signal and further down-converts the baseband signal to a video baseband using a video complex mixer driven by an inner feedback loop that corrects fast phase perturbations in the video recovery circuit. Finally, the digital IF demodulator includes an audio recovery circuit that (i) receives said baseband signal from the parallel multiplier, and (ii) down-converts the audio component to an audio baseband signal using an audio complex mixer.

A sound source generating unit 101 generates from a narrowband audio signal not passing through noise suppression a sound source signal including a fine structure of a band to be restored. On the other hand, a noise suppressing unit 102 performs noise suppression of the narrowband audio signal and a spectral envelope estimating unit 103 estimates an spectral envelope of the band to be restored. A signal synthesizing unit 104 generates a pseudo-audio signal by combining the sound source signal and the spectral envelope, and the band-pass filter unit 105 passes the pseudo-audio signal of the band to be restored, and the signal addition unit 106 generates a broadband audio restoration signal by adding the pseudo-audio signal of the band to be restored to the narrowband audio signal.

The invention provides a method of adjusting an audio output and an audio playing device. The audio playing device comprises a sampling unit. According to the method, the audio playing device adjusts a sampling frequency of a current audio file by the sampling unit based on an audio frequency in the current audio file obtained from a playlist; and decoding processing and audio restoration of the current audio file are conducted based on the sampling frequency. As for the decoding and restoration of the audio frequency of the audio file, the invention solves the problem of sound quality distortion as the audio source needs to be resampled due to the fixed audio output frequency in the prior art.

The invention relates to an audio data encoding method and device, an audio data decoding method and device, electronic equipment and a storage medium, and aims to at least solve the problem of poor real-time audio transmission quality in related audio recovery technologies. The audio data encoding method comprises the following steps: obtaining a packet loss rate of sent first audio data, the packet loss rate being a ratio of a packet loss number to a first number, the packet loss number being a difference between a second number and the first number, the first number being the number of datapackets of the first audio data sent by a sending end, and the second number being the number of data packets of the first audio data received by a receiving end; determining an encoding mode of second audio data to be transmitted according to the packet loss rate; and encoding the second audio data by adopting the encoding mode. The audio data encoding method and device, the audio data decodingmethod and device, the electronic equipment and the storage medium are applied to an audio transmission scene.

The invention relates to an ultrasonic coding and decoding system based on jitter sound wave signals. The system comprises a data processing module, a data buffer module, a network communication module, an address coding module, a clock module, a clock signal frequency division module, a digital-to-analogue conversion module, a data communication bus module, a drive module, a control unit, an audio frequency signal collection unit, a filter module and an audio frequency coding module. The data communication bus module is electrically connected with the data buffer module, the network communication module, the address coding module, the clock module, the clock signal frequency division module, the drive module, the filter module and the audio frequency coding module. The data buffer module is electrically connected with the data processing module and the audio frequency coding module. The drive module is electrically connected with the control unit and the audio frequency signal collection unit. According to the invention, the work efficiency and the accuracy of audio frequency signal coding can be effectively improved, and the efficiency of audio frequency decoding and the accuracy of audio restoration can be effectively improved.

The invention discloses an audio restoration auxiliary rescue system based on optical fiber vibration, and belongs to the technical fields of safety production and accident rescue. The audio restoration auxiliary rescue system solves the problems of dependence of the prior art on a power system, poor anti-interference ability, large rescue positioning deviation and the like. The principle of the audio restoration auxiliary rescue system is that an optical fiber is used as a sensor, a pulsed light source emits pulsed light into the optical fiber, and at the same time, equipment detects the back-Rayleigh scattered light at the incident end of the pulsed light to analyze return light intensity information. The back-Rayleigh scattering of the optical fiber is high in regularity, and when the optical fiber has no vibration, the intensity of the back-Rayleigh scattering returned is basically fixed. Slight vibration information caused by activities or speaking of underground personnel is transmitted back to the ground through the optical fiber, and an analysis system determines the location of vibration and restores the audio according to the time at which an abnormal value is, so that arescue command center knows the exact location and status information of personnel to be rescued in time, and a reliable information guarantee is provided for accurate rescue.

The invention discloses a Bluetooth audio restoration method and device, equipment and a medium. The method comprises the steps of obtaining connection parameter information when a Bluetooth audio data packet is transmitted to a Bluetooth device; when it is judged that the Bluetooth audio is abnormal based on the connection parameter information,detecting an input operation instruction, wherein the operation instruction is used for indicating that the Bluetooth audio is in a stuck state; and in response to the operation instruction, carrying out restoration processing on the Bluetooth audio. According to the scheme, when the Bluetooth audio is in the stuck state, the Bluetooth audio can be automatically repaired, so that the transmission accuracy of the audio information is improved, and the user experience is improved.

The invention provides a spherical sensor. The spherical sensor comprises a driving module for receiving a moving instruction sent by a control terminal, and driving the spherical sensor to move to a target area according to the moving instruction; a video acquisition module for receiving a target locking instruction sent by the control terminal, locking a target object according to the target locking instruction and acquiring video information of the target object; an audio restoration module for extracting audio information which is environmental audio information of the target area from the video information of the target object; and a wireless communication module for transmitting the audio information to the control terminal. Moreover, the invention also provides an audio remote detection method and system applying the spherical sensor. Through adoption of the spherical sensor, remote detection of audio signals can be realized.

The embodiment of the invention relates to an audio restoration method and device, equipment and a medium. The method comprises the following steps: acquiring an audio frame signal to be processed; detecting a wave cutting interval existing in the audio frame signal, wherein the wave cutting interval comprises a plurality of continuous wave cutting points, and the wave cutting points are signal points of which the amplitudes exceed a preset threshold value; judging whether the detected wave cutting interval meets a specified interpolation condition or not according to a non-wave cutting point close to the wave cutting interval; and if yes, repairing the cut wave interval by adopting a specified interpolation method based on the non-cut wave point. According to the audio repairing method provided by the embodiment of the invention, the required operand is very low, so that the repairing time can be greatly shortened, and a quick and real-time audio repairing effect can be achieved.