98 results about "Audio frequency" patented technology

Methods and apparatus for executing a lighting program to control a plurality of light emitting diodes (LEDs) in response to at least one characteristic of an audio input. In one embodiment, the audio input is digitally processed to determine the at least one characteristic. In other embodiments, control signals for the LEDs are generated in response to a timer and/or input from a user interface, as well as in response to the at least one characteristic of the audio input. In another embodiment, the control signals for the LEDs are generated by a same computer that processes the audio input to transmit signals to speakers to audibly play the audio input. In a further embodiment, a GUI is provided to assist in authoring the lighting program. In another embodiment, the audio signal is processed before being played back. In a further embodiment, the lighting program anticipates changes in the audio input.

A portable assistive listening system for enhancing sound for hearing impaired individuals includes a fully functional hearing aid and a separate handheld digital signal processing (DSP) device. The focus of the present invention is directed to the handheld DSP device. The DSP device includes a programmable digital signal processor, a UWB transceiver for communicating with the hearing aid and/or other wireless audio sources, an LCD display, and a user input device (keypad). The handheld device is user programmable to apply different processing algorithms for processing sound signals received from the hearing aid or other audio source. The handheld device is capable of receiving audio signals from multiple sources, and gives the user control over selection of incoming sources and selective processing of sound. In the context of being user programmable, the digital signal processing device includes a software platform that provides for the ability of the user to select or “plug-in” desired processing algorithms for application to selected incoming audio channels and a communication port for the user to connect to a PC or other device to download preferred processing algorithms. The communication port provides the user with the ability to retrieve desirable processing algorithms from a database of available algorithms and download those algorithms directly into the device for use.

A method for use in editing video content and audio content, wherein the method includes, in a processing system, determining a video part using video information, the video information being indicative of the video content, and the video part being indicative of a video content part, determining an audio part using first audio information, the first audio information being indicative of a number of events and representing the audio content, and the audio part being indicative of an audio content part including an audio event and editing, at least in part using the audio event, at least one of the video content part and the audio content part using second audio information indicative of the audio content.

A system and method for transmitting video and audio information among communicating wireless devices during a video conference in a wireless communications system. The audio information from all participants is received by a server, which selects a speaker among the participants. The speaker's audio and video data are transmitted to all participants according to a predefined criteria.

A music application guides a user with some musical experience through the steps of creating and editing a musical enhancement file that enhances and plays in synchronicity with an audio signal of an original artist's recorded performance. This enables others, perhaps with lesser musical ability than the original artist, to play-along with the original artist by following melodic, chordal, rhythmic, and verbal prompts. The music application accounts for differences in the timing of the performance from a standard tempo by guiding the user through the process of creating a tempo map for the performance and by associating the tempo map with MIDI information of the enhancement file. Enhancements may contain MIDI information, audio signal information, and/or video signal information which may be played back in synchronicity with the recorded performance to provide an aural and visual aid to others playing-along who may have less musical experience.

An apparatus and system for communicating an emergency and an associated method are provided. In one embodiment of the present invention, the apparatus is a mobile terminal including an input mechanism that is capable of receiving user input indicative of an emergency, and a wireless transmitter capable of transmitting an emergency message. The mobile terminal further includes a recording device capable of recording at least one of audio and imagery information indicative of the emergency, and a memory capable of storing the audio and imagery information. The audio and imagery information are also capable of being transmitted by the wireless transmitter.

A swimming pool drowning prevention safety system. The swimming pool drowning prevention safety system comprises: an article wearable by a person, a radio frequency transmitting device coupled to the article for transmitting a radio frequency signal, a microprocessor controlled radio frequency receiving station for receiving the radio frequency signal from the radio frequency transmitting device when the radio frequency transmitting device is within a user adjustable radio reception range of the radio frequency receiving station, and an alert signaling device coupled to the radio frequency receiving station for signaling when the person wearing the article has come within the user adjustable radio reception range of the radio frequency receiving station. The swimming pool drowning prevention safety system is further comprised of an adjustable gain control for varying the RF sensitivity of the radio frequency receiving station, and an RF sensitivity trigger circuit coupled to an audio messaging system for broadcasting at least one selected alert message. The swimming pool drowning prevention safety system further comprises telephone circuitry connection equipment for automatically connecting to a telephone system and transmitting the selected alert message. The swimming pool drowning prevention safety system further comprises a microprocessor that controls and integrates operation of the radio frequency receiving station.

The composite sound-absorbing device of the present invention includes a perforated board having a number of first pores thereon, a back board and side boards, the perforated board, back board and side boards forming a closed cavity, wherein: at least one or more of the resonant cavities being located within the closed cavity; at least one or more of second pores being located on the resonant cavities; at least one of the second pores being connected with the closed cavity; the resonant cavity having a volume of V=10 mm³ −1×10¹⁰ mm³, having a thickness of 0.05 mm-10 mm, the second pores having an aperture of d′=0.05-100 mm, with a perforation rate σ′=0.01%-30%. The present invention is beneficial to improve the effect of sound-absorbing and expand the frequency band of sound-absorbing.

The present invention provides novel methods and devices for providing audio to players of a gaming machine and to nearby players. According to preferred implementations, sounds intended for a person currently using a gaming machine are distinguished from second sounds intended for persons who are not currently using the gaming machine. The former sounds are directed to the player of the gaming machine by one or more methods and/or devices. For example, the gaming machine may include a device for producing ultrasonic waves (e.g., in a beam) that produce the first sounds via interaction with a medium, a sound dome, a speaker array, or other devices for producing directional sound. The sound may be directed to a predetermined area near the gaming machine. Alternatively, the sound may be directed to an area at or near where the player is detected to be, where the player's player tracking card is detected to be, etc.

A method of distributing electronic audio or video content from a distributing computer system to a user device (such as a computer, PDA or mobile telephone) over a telecommunications network, comprising: the distributing computer system detecting at least one characteristic of the user device, the distributing computer system selecting a version of the content according to the characteristic, and the distributing computer system transmitting to the user device the selected version of the content. The invention also provides a method of processing electronic content comprising: encoding the content with programming code indicative of playback preferences, for facilitating preloading of the content, for detecting at least one characteristic of a user device or a communications link thereto, or any combination of these. The programming code may be inserted automatically or manually, and may comprise a link.

A system and a method for the scalable coding of a multi-channel audio signal comprising a principal component analysis (PCA) transformation of at least two channels (L, R) of the audio signal into a principal component (CP) and at least one residual sub-component (r) by rotation defined by a transformation parameter (θ), comprising the following steps: formation of a frequency subband-based residual structure (Sf_r) on the basis of the at least one residual sub-component (r), and definition of a coded audio signal (SC) comprising the principal component (CP), at least one residual structure (Sf_r) of a frequency subband and the transformation parameter (θ).

An audio-video player, which automatically determines an event corresponding to the current state and displays a preferred message associated with the event, is provided. A DVD player includes: a massage table which stores prescribed messages in advance by associating them with a plurality of events having prescribed priorities; an event determination unit which sequentially determines whether the current state corresponds to an event, starting from an event of higher priority; and a message display control unit which reads out, when the event determination unit found the corresponding event, a prescribed message associated with the corresponding event from a message table and displays it.

A device for attenuating sound on the human ear, especially for preventing sleep disturbances caused by noise and other sounds. The device for attenuating sound has good damping properties and also ensures that certain alarm sounds are heard in spite of the sound-attenuating measure. To this end, a radio receiver with means for converting radio signals received from a radio station into audio signals is integrated into at least one of two sound-attenuating ear plugs. The radio station is connected to at least one alarm-sounding means and/or at least one sound-receiving means in order to convert a specific alarm and/or at least one specific sound into a radio signal that can be received by a radio receiver as it occurs.

The invention discloses a method for recording synchronization, a device for the recording synchronization and equipment for the recording synchronization and belongs to the field of terminal equipment. The method comprises the steps that an audio data stream is obtained in the process of recording; the obtained audio data stream is coded according to a preset coded format and data generated by coding are written in an audio file; the data are read from the audio file which involves in the process of writing; the data which are read each time are uploaded to a server, so that the synchronization is conducted by the server according to the received data. The device comprises an audio data stream obtaining module, a writing module, a data reading module and an uploading module. Real-time recording synchronization is achieved, the effects that storage can be conducted at the moment of recording and uploading can be conducted at the moment of the storage are achieved, recording content can be recovered to the maximum extent according to the conducted synchronization on the server when the recording is not finished and interrupted by accident or deleted by accident, safety of the audio file is protected, the stability of the audio file is improved and the purpose of recovering the data is achieved.

The application provides an audio and video synchronization method applied to a first terminal. The first terminal can receive an audio data packet ad a video data packet that are sent by a second terminal; and the audio data packet includes an audio time stamp and the video data packet includes a video time stamp. Because the audio time stamp and the video time stamp are generated by the second terminal based on same system time, the audio time stamp and the video time stamp have an association relation. When video data are played, the time corresponding to the video time stamp is compared with time corresponding to the audio time stamp; if the time corresponding to the video time stamp is earlier than the time corresponding to the audio time stamp, the video data packet is abandoned; and if the time corresponding to the video time stamp is later than the time corresponding to the audio time stamp, the video data are played in a delayed mode, thereby realizing audio and video synchronization. Besides, the time stamps are field data in data packets. According to the provided synchronization method, no extra bandwidth occupation is added, so that the bandwidth resources are saved.

The invention discloses a mobile device and an operation method. The mobile device comprises a sound detection unit, a signal processing unit, a sound mixing unit, and a loudspeaker; and the mobile device plays the sound mixing signal through the loudspeaker in a sound mixing mode. The mobile device and the operation method convert environment sound around the mobile device to external sound signals, uses an external sound signal and a music signal to generate a mixing sound frequency signal in the sound mixing mode. As a result, the mobile device can selectively play the sound mixing signal through the loudspeaker and can further improve convenience and safety of the usage of the mobile device.

The present invention relates to a communication terminal device, in particular to a Bluetooth terminal device with handfree function, which aims to provide a bluetooth loudspeaker that not only allows handfree communication in match with a bluetooth mobile phone, but also allows internet communication in coordination with a computer. The bluetooth loudspeaker has buttons and circuit device; the circuit device has a speaker, a microphone, a bluetooth module unit, a bluetooth antenna, an audio frequency amplifying circuit and a power system. The circuit also has a handfree chipset; the handfree chipset and the bluetooth module are in a biadirectional electric connection with each other; the audio frequency amplifying circuit and the microphone are respectively electrically connected with the handfree chipset. The speaker is connected with the audio frequency amplifying circuit; the bluetooth antenna is connected with the bluetooth module; the power system is respectively electrically connected with the handfree chipset and the bluetooth module.

An information transmission system is broken down into a sound recorder, a transmission medium and a sound reproducer; a digital audio signal is produced from MIDI music data words through any kind of modulation technique such as, for example, Y-modulation technique, P-modulation technique or Q-modulation technique, and the digital audio signal is transferred from the sound recorder through the transmission medium such as a magneto-optic disc, a wire communication network or the free space to the sound reproducer, when the digital audio signal reaches the sound reproducer, the sound reproducer analyzes the digital audio signal to see what modulation technique was employed to produce it, and demodulates the digital audio signal through an appropriate demodulation technique, thereby permitting user to employ any sound recorder to produce the digital audio signal.

This method includes steps of: A, according to the parameter bit distributing and quantizing (BDQ) the last frame signal and also meeting the coding requirement, obtaining the initial value (IV) of the parameter for BDQ the current frame signal (CFS); B, using IV to BDQ repeatedly CFS until finding the parameter meeting the requirement of coding the current frame; BDQ the found parameter to obtain the audio specimen output. Besides, this invention also discloses a corresponding audio coding device. This method and device well uses the energy and frequency component relativity between two neighboring frame signals, therefore reduces the circular number and the calculating work.

In accordance with embodiments of the present disclosure, a digital microphone system may include a microphone transducer and a digital processing system. The microphone transducer may be configured to generate an analog input signal indicative of audio sounds incident upon the microphone transducer. The digital processing system may be configured to convert the analog input signal into a first digital signal having a plurality (e.g., more than 3) of quantization levels, and in the digital domain, process the first digital signal to compress the first digital signal into a second digital signal having fewer quantization levels (e.g., +1, 0, -1) than that of the first digital signal.

An apparatus and method for minimizing the quantization noise as muting are provided, and particularly applied to a Delta-Sigma modulator that is used to process digital-to-analog conversion. By means of a zero-sampling detection circuit and a dynamic gain mechanism, a dynamic gain is introduced to minimize the quantization noise occurred as muting. The method preferably includes a first step for receiving the signals by the Delta-Sigma modulator inputted from an audio decoder, and a next step for detecting signal zero by a zero-sampling detection unit and counting the number of the signals with signal zero. The mute state is entered when the number of signal zeros reaches a pre-set number. At the moment, the signaling route is switched to another route with dynamic gain mechanism. Further, the dynamic gain mechanism is activated for producing a dynamic gain, which will be fed back to the input end of the modulator.

The embodiment of the invention provides a training method for a mixed speech recognition model of mandarin and Sichuan. The method comprises the steps of determining features of mixed training audiodata, and determining the features as input data for training based on phoneme-based data alignment and Chinese character-based data alignment; inputting to N common intermediate layers, calculating afirst loss function by a first task layer, and calculating a second loss function by a second task layer; training N layers of first task layers based on the first loss function, training N layers ofsecond task layers based on the second loss function, performing multi-task training based on the trained first neural network parameters and the trained second neural network parameters, and training N layers of common intermediate layers. The embodiment of the invention further provides a training system for the mixed speech recognition model of mandarin and Sichuan. According to the embodimentof the invention, phonemes and Chinese characters are used as tasks of multi-task joint training, so that the recognition performance of mandarin and Sichuan talks is improved, and the resource occupation is reduced.