An audio jack includes an insulating housing having a mating wall, a rear wall, a top wall and two sidewalls. An inserting cavity is defined to pass through the mating wall and extend toward the inner of the insulating housing. The rear wall defines a through-hole communicating with the inserting cavity and the outside. The sidewalls define contact cavities, and a mating contact cavity is defined on the rear wall and communicates with the through-hole. A center pin has a connecting portion recei...

The present invention relates to audio signal processing such as equalisation and spatial enhancement functions. The present invention provides an audio signal processing circuit arrangement for two audio channels, and which combines spatial enhancement or acoustic mixing (crosstalk) cancelling with graphic equalisation functions. This is achieved with a circuit structure having a reduced filter count compared with known cascaded circuits dedicated to each function. The circuit structure process...

An audio compression circuit for limiting an audio television signal in a linear fashion at a pre-established maximum level is disclosed. The circuit includes a series resistance circuit for establishing a predetermined resistance on an amplifier to establish a supply voltage through a detection and level adjustment circuit. The detection and level adjustment circuit increases the supply voltage to a relatively higher reference voltage, which is shifted through a level adjustment circuit to a co...

Quantizing section 1 input audio signal data with a quantizing step width. First predicting section 14 predicts a quantization step width to be supplied to the quantizing section on the basis of the input audio signal and a number of bits of quantized data. Second predicting section 15 predicts the quantization step width on the basis of the input audio signal and a number of bits of quantized data. Coding section 2 performs Huffman coding on the quantized data. Calculating section 3 calculates ...

An audio shoe includes a shoe top attached to a sole, and a channel extending into the sole from a side edge thereof. A speaker attached to a housing is positioned inside the channel. The speaker is oriented with its axis in a vertical position. A slot is provided between the front of the speaker and the side edge of the sole to enable sound to escape. The diameter of the speaker may be up to the width of the sole, which is large enough to provide improved sound volume and quality. In a first em...

Coding (1) of an audio signal is provided including estimating (110) a position of a transient signal component in the audio signal, matching (111,112) a shape function on the transient signal component in case the transient signal component is gradually declining after an initial increase, which shape function has a substantially exponential initial behavior and a substantially logarithmic declining behavior; and including (15) the position and shape parameters describing the shape function in ...

A transformer 11, which converts input current into voltage output, is arranged between a power switch 1, which amplifies and outputs audio signals based on the power source voltage VDD supplied to MOS transistors Q1 to Q4, and a speaker 3. Through appropriately determining the turns ratio (Ns/Np), without causing the power source voltage VDD of the power switch 1 to be large, large voltage Vs is made to occur at both ends of the speaker 3 from such small power source voltage VDD. Through this, ...

An audio system comprises an audio source terminal 11 and a audio playback terminal 13, connected to each another by a wireless data link 14. The source terminal 11 comprises a source computer 15, and a cellular modem 17. The playback terminal 13 comprises a playback computer 19 having an internal processor 23 and an audio processor 24. Connected to the processor 23 is a cellular modem 21, an audio transducer 25, and a user control 27. Data relating to audio components, representing different se...

In a first aspect, the invention provides an audio amplifier. A regulator reference signal corresponding to an input audio signal is generated by regulator reference generator. A power signal is generated corresponding to the regulator reference signal by a voltage regulator. A compensation block also uses the input signal, or a delayed version of the input signal to generate a modulation control signal. A modulator generates a modulated signal in response to the modulation control signal. An ou...

Coding of an audio signal (x) is provided where the coded bitstream (AS) comprises a parametric representation of the audio signal. One component of the parametric representation comprises tracks of linked sinusoidal components (CS) where subsequently linked components are coded differentially from parameters of linked signal components already determined. The coder scrambles (18) the differentially encoded frequency and/or amplitude values by mapping the differential values onto other different...