33 results about "Audio coding format" patented technology

Storing audio data encoded in any of a plurality of different audio encoding formats is enabled by parametrically defining the underlying format in which the audio data is encoded, in audio format and packet table chunks. A flag can be used to manage storage of the size of the audio data portion of the file, such that premature termination of an audio recording session does not result in an unreadable corrupted file. This capability can be enabled by initially setting the flag to a value that does not correspond to a valid audio data size and that indicates that the last chunk in the file contains the audio data. State information for the audio data, to effectively denote a version of the file, and a dependency indicator for dependent metadata, may be maintained, where the dependency indicator indicates the state of the audio data on which the metadata is dependent.

The present invention provides method and device for transcoding between audio coding formats with different time-frequency analysis domains, as used for example by MP EG-AAC and mp3, particularly for facilitated and faster transcoding between such audio signals. A method for transcoding a framed audio signal from a first parameter domain into a second parameter domain comprises linearly transforming two or more parameters of the first parameter domain to at least one parameter of the second parameter domain, wherein the two or more parameters of the first parameter domain come from different frames of the audio signal in the first parameter domain. The linear transformation can be described as a matrix and implemented as a look-up table, wherein the matrix transformation coefficients below -60 Decibels are neglected.

The present invention provides method and device for transcoding between audio coding formats with different time-frequency analysis domains, as used for example by MPEG-AAC and mp3, particularly for facilitated and faster transcoding between such audio signals. A method for transcoding a framed audio signal from a first parameter domain (PDA) into a second parameter domain (PDB) comprises linearly transforming (TT) two or more parameters of the first parameter domain (PDA) to at least one parameter of the second parameter domain (PDB), wherein the two or more parameters of the first parameter domain come from different frames of the audio signal in the first parameter domain. The linear transformation (TT) can be described as a matrix and implemented as a look-up table.

The invention discloses a Bluetooth audio sending end in an audio encoding format and automatically configuring the transmission of high quality Bluetooth audio data, and a method and a system thereof. By comparing the audio encoding format of a local audio file with the audio encoding format supported by a Bluetooth audio receiving end, the Bluetooth audio sending end chooses an A2DP transmission audio encoding format for transmitting the high quality audio data from the Bluetooth audio sending end to the Bluetooth audio receiving end; if the audio encoding format supported by the Bluetooth audio receiving end contains the audio encoding format of the local audio file, the audio encoding format of the local audio file is selected as the A2DP transmission audio encoding format and an audio play module is added to the Bluetooth audio sending end, thereby the Bluetooth audio sending end can directly transmit the high quality audio data by an A2DP link circuit and in the audio encoding format of the local audio file to the Bluetooth audio receiving end with no need of the operation of the soundcard of the system for collecting the high quality audio data and the conversion of the audio encoding format.

The invention discloses an audio data transmission method and device, belonging to the field of data transmission. The audio data transmission method includes: receiving a first policy adjustment request sent by a playback device, obtaining an audio sampling frequency parameter and an audio encoding format parameter contained in the first policy adjustment request; adjusting the sampling rate of the microphone according to the audio sampling frequency parameter parameters, collecting recording data through the microphone; mixing the recording data and accompaniment data to obtain audio data; encoding the audio data according to the encoding method corresponding to the audio encoding format parameters to obtain an audio data stream; Sending the audio data stream to the playback device. The present invention solves the problem that karaoke needs a set of professional hardware equipment support in related technologies, causing users to not be able to do karaoke anytime and anywhere, and achieves the effect of reducing the hardware requirements needed for karaoke, so that users can play karaoke anytime and anywhere .

The present application provides a processing method for playing video files, the method comprising: storing the file encapsulation format, video encoding format, and audio encoding format of the target video file together with the file name as a file identifier; when receiving the target video When a file is requested to be played, the file identifier corresponding to the file name is read, so that the player performs initialization operations of demultiplexing, video decoding, and audio decoding for the target video file based on the file identifier. It can save the time of video files parsing video and audio encoding formats by traversing and parsing file encapsulation formats, directly hit all the information required for player initialization, increase the playback speed of video files, and improve user experience.

A method of providing audio information, said method comprising: (i) receiving audio filter settings in a client device; (ii) receiving audio data in the client device, wherein the received audio data is in an audio coding format; (iii) converting the audio filter settings to an audio filter signal in a processor of the client device, where the audio filter signal is a time-varying signal; (iv) converting the received audio data to an audio signal in a processor of the client device, where the audio signal is a time-varying signal; and (v) transmitting the converted audio filter signal and the converted audio signal from the client device to an audio output device, where the audio output device is separate from and in communication with the client device, and where the audio output device is configured for modifying the audio signal according to the audio filter signal to generate a time-varying audio output.

The invention discloses a streaming media data transcoding method, which is suitable for completion in a computing device, comprising: receiving source streaming media data, demultiplexing the source streaming media data stream, decomposing source audio data and source video data, The source audio data is in a first audio coding format; the source audio data is processed by audio data to convert it into target audio data, and the target audio data is in a second audio coding format; video data processing is performed on the source video data Obtain target video data; multiplex the target audio data and target video data to obtain target streaming media data. The invention also discloses a corresponding streaming media data transcoding device, computing device and readable storage medium.

The invention discloses a method for guaranteeing subjective perception of VoLTE users. The method includes: obtaining the user's real objective perception service index and the voice media flow objective perception service index of each dial test task; obtaining each dial test task and the result of the dial test task Combining the objective perception service indicators of the voice media stream of the dialing test task, calculating the impairment parameters of each audio coding format; according to the real objective perception service indicators of the user, combined with the corresponding impairment parameters of the audio encoding format, obtaining And save the user's subjective perception damage reduction value; according to the user's complaint information, add a complaint label to the user's subjective perception damage reduction value, count the number of different complaints, and obtain the relationship between the number of complaints and the corresponding subjective perception damage reduction value Curve; set the tolerance value of user complaints, obtain the threshold of subjective perception damage reduction value corresponding to the tolerance value of user complaints according to the relationship curve, if the user’s subjective perception damage reduction value is greater than the threshold, generate user subjective Perceived impairment warning. The invention also discloses a VoLTE user subjective perception protection device.