35results about How to "Improve listening quality" patented technology

A control logic means preferably for a receiver comprising a jitter buffer means adapted to receive and buffer incoming frames or packets and to extract data frames from the received packets, a decoder connected to the jitter buffer means adapted to decode the extracted data frames, and a time scaling means connected to the decoder adapted to play out decoded speech frames adaptively. The control logic means comprises knowledge of whether a state recovery function is available and is adapted to retrieve at least one parameter from at least one of the jitter buffer means, the time scaling means, and the decoder, to adaptively control at least one of an initial buffering time of said jitter buffer means, the knowledge of the availability of the state recovery function, and a time scaling amount of said time scaling means from the time scaling means or the decoder.

A very coarse quantization exceeding the measure determined by the masking threshold without or only very little quality losses is enabled by quantizing not immediately the prefiltered signal, but a prediction error obtained by forward-adaptive prediction of the prefiltered signal. Due to the forward adaptivity, the quantizing error has no negative effect on the prediction on the decoder side.

A method, an electronic apparatus and a wireless earphone of choosing a master wireless earphone in a wireless earphone set are provided. The method is adapted to the electronic apparatus pairing with the wireless earphone set. The method includes: transmitting first testing signals to a first wireless earphone in the wireless earphone set, and receiving first acknowledgment signals; transmitting second testing signals to a second wireless earphone in the wireless earphone set, and receiving second acknowledgment signals; determining whether a first ratio of the first acknowledgment signals to the first testing signals is higher than a second ratio of the second acknowledgment signals to the second testing signals; if yes, choosing the first wireless earphone as a master earphone, and setting the second wireless earphone as a slave wireless earphone; if no, choosing the second wireless earphone as the master earphone, and setting the first wireless earphone as the slave wireless earphone.

The embodiment of the invention relates to a control method and a control device. The method comprises the steps of acquiring audio information of current environmental noise, acquiring intensity value of current environmental noise according to current audio information, amplifying or lessening collected local call audio information according to intensity value of current environmental noise, and sending the amplified or lessened local call audio information.

The invention discloses an audio object coding and decoding method based on frequency spectrum shifting. This method proposes a strategy including global shifting and local shifting to reduce aliasing distortion. In the encoding stage, time-frequency transformation is first performed to obtain the spectrum information of multiple input signals; then, it is judged whether aliasing occurs in each subband, and the aliased areas will be sorted according to the degree of aliasing; after determining the time-frequency area that needs to be moved, The aliased time-frequency points are moved to the non-aliasing area, and there are two strategies for moving the time-divided overall shift and local shift. The overall shift can greatly reduce the shift information that needs to be recorded; finally, the downmix signal and side information are synthesized into a code stream. In the decoding stage, the time-frequency components are first restored to their original positions according to the moving information, and then decoded according to the joint audio object coding framework SAOC. The present invention moves aliased time-frequency information to a non-aliased area in a downmixing process by using a spectrum shifting strategy, thereby reducing aliasing distortion and improving decoded audio quality.

The invention discloses an audio object encoding method suitable for a personalized interactive system. In the encoding stage, the invention first transforms multiple audio objects to be encoded from the time domain into the frequency domain by frame division and windowing; according to each object Sort the energy of each step to determine the coding order of the objects; extract the coding objects and the corresponding downmix signals of each step in a loop, and calculate the parameters and residuals of each step accordingly; use singular value decomposition to decompose and compress the large-sized residual matrix; Combining the final mixed signal, parameter and residual decomposition matrix into a code stream. In the decoding stage, the decomposition matrix is ​​used to reconstruct the residual; then, according to the residual and parameters of each object, the objects are decoded and reconstructed from the downmix signal step by step. The invention can simultaneously ensure low code rate and high quality reconstruction of each audio object through sequential multi-step codec and residual decomposition.

The invention discloses an earphone for communication. The earphone comprises a rubber sleeve, rubber connecting rods are connected to the inner walls of the two sides of the rubber sleeve in a sliding manner; connecting blocks are fixed to the ends, away from the rubber sleeves, of the two rubber connecting rods through screws. A first earphone shell and a second earphone shell are fixed to the outer walls of the opposite sides of the two connecting blocks through screws correspondingly. Grooves are formed in the outer walls of the opposite sides of the first earphone shell and the second earphone shell, loudspeakers are fixed to the inner walls of the grooves through screws, and connecting columns are fixed to the inner walls of the sides, away from the first earphone shell, of the second earphone shell through screws. The fabric is good in air permeability;, Compared with the prior art, the earphone has the advantages that the wearing comfort is obviously improved, the influence onthe normal work of the earphone due to the fact that sweat permeates into the earphone shell in the wearing process is avoided, the external sound interference is isolated, the listening quality of the earphone is improved, components in the earphone are prevented from being burnt out after long-time working, and the service life of the earphone is obviously prolonged.