Abstract: The present invention provides an audio data transmission method for transmitting encrypted audio data, an audio processing system and computer system thereof. The audio data transmission method includes providing an audio data, performing an encryption process upon the audio data according to an encryption standard and a format of the audio data, transmitting the encrypted audio data to an audio device according to a link standard, and utilizing the audio device to perform a decryption process upon the encrypted audio data.

Abstract: The signal generating apparatus includes a signal modulating unit, a selection signal generating unit, and a phase adjusting unit. The signal modulating unit is utilized for processing a modulation upon an input signal to generate a modulated signal. The selection signal generating unit is utilized for generating at least a first selection signal. The phase adjusting unit is coupled to the signal modulating unit and the selection signal generating unit, and is utilized for receiving the modulated signal and adjusting a pulse width of the modulated signal to generate an output signal according to the first selection signal.

Abstract: A controller of a power amplifier includes an oversampler for oversampling an incoming digital signal to generate an oversampled signal, a controlling module for generating a first control signal and a second control signal according to the oversampled signal, a PWM circuit for generating a first PWM signal according to the first control signal, and a pulse width adjuster for adjusting a pulse width of the first PWM signal according to the second control signal to generate a second PWM signal for controlling a power stage of the power amplifier.

Abstract: The present invention provides an audio data transmission method for transmitting encrypted audio data, an audio processing system and computer system thereof. The audio data transmission method includes providing an audio data, performing an encryption process upon the audio data according to an encryption standard, transmitting the encrypted audio data to an audio device according to a link standard, and utilizing the audio device to perform a decryption process upon the encrypted audio data.

Abstract: A controller of a power amplifier includes an oversampler for oversampling an incoming digital signal to generate an oversampled signal, a controlling module for generating a first control signal and a second control signal according to the oversampled signal, a PWM circuit for generating a first PWM signal according to the first control signal, and a pulse width adjuster for adjusting a pulse width of the first PWM signal according to the second control signal to generate a second PWM signal for controlling a power stage of the power amplifier.

Abstract: A folding chair includes first and second parts each having at least one leg, a total number legs of the first and second parts being at least three. A third part of the chair forms a seat and is pivotally connected to the first and second parts. A connecting assembly for pivotally connecting the first part to the second part is a piston assembly having a top end and a bottom end. The top end is pivotally connected to the first part to form a pivot at which the first part pivots relative to the second part between an open position and a closed position. The bottom end is connected to the second part. The connection between the top end and the first part forms the only physical connection between the first and second parts to eliminate cutting dangers to the user.

Abstract: A folding chair includes first and second parts each having at least one leg, a total number legs of the first and second parts being at least three. A third part of the chair forms a seat and is pivotally connected to the first and second parts. A connecting assembly for pivotally connecting the first part to the second part is a piston assembly having a top end and a bottom end. The top end is pivotally connected to the first part to form a pivot at which the first part pivots relative to the second part between an open position and a closed position. The bottom end is connected to the second part. The connection between the top end and the first part forms the only physical connection between the first and second parts to eliminate cutting dangers to the user.

Abstract: A folding chair includes first and second parts each having at least one leg, a total number legs of the first and second parts being at least three. A third part of the chair forms a seat and is pivotally connected to the first and second parts. A connecting assembly for pivotally connecting the first part to the second part is a piston assembly having a top end and a bottom end. The top end is pivotally connected to the first part to form a pivot at which the first part pivots relative to the second part between an open position and a closed position. The bottom end is connected to the second part. The connection between the top end and the first part forms the only physical connection between the first and second parts to eliminate cutting dangers to the user.

Abstract: A folding chair includes first and second parts each having at least one leg, a total number legs of the first and second parts being at least three. A third part of the chair forms a seat and is pivotally connected to the first and second parts. A connecting assembly for pivotally connecting the first part to the second part is a piston assembly having a top end and a bottom end. The top end is pivotally connected to the first part to form a pivot at which the first part pivots relative to the second part between an open position and a closed position. The bottom end is connected to the second part. The connection between the top end and the first part forms the only physical connection between the first and second parts to eliminate cutting dangers to the user.

Abstract: A pre-coding method and device for improving data compression performance by removing correlation between a first original data set and a second original data set, each having M members, respectively. The pre-coding method produces a compression-efficiency-enhancing double-difference data set. The method and device produce a double-difference data set, i.e., an adjacent-delta calculation performed on a cross-delta data set or a cross-delta calculation performed on two adjacent-delta data sets, from either one of (1) two adjacent spectral bands coming from two discrete sources, respectively, or (2) two time-shifted data sets coming from a single source. The resulting double-difference data set is then coded using either a distortionless data encoding scheme (entropy encoding) or a lossy data compression scheme. Also, a post-decoding method and device for recovering a second original data set having been represented by such a double-difference data set.

Abstract: A pre-coding method and device for improving data compression performance by removing correlation between a first original data set and a second original data set, each having M members, respectively. The pre-coding method produces a compression-efficiency-enhancing double-difference data set. The method and device produce a double-difference data set, i.e., an adjacent-delta calculation performed on a cross-delta data set or a cross-delta calculation performed on two adjacent-delta data sets, from either one of (1) two adjacent spectral bands coming from two discrete sources, respectively, or (2) two time-shifted data sets coming from a single source. The resulting double-difference data set is then coded using either a distortionless data encoding scheme (entropy encoding) or a lossy data compression scheme. Also, a post-decoding method and device for recovering a second original data set having been represented by such a double-difference data set.

Abstract: A method of lossless data compression for efficient coding of an electronic signal of information sources of very low information rate is disclosed. In this method, S represents a non-negative source symbol set, {s.sub.0, s.sub.1, s.sub.2, . . . s.sub.N-1 } of N symbols with s.sub.i =i. The difference between binary digital data is mapped into symbol set S. Consecutive symbols in symbol set S are then paired into a new symbol set .GAMMA. which defines a non-negative symbol set containing the symbols {.gamma..sub.m } obtained as the extension of the original symbol set S. These pairs are then mapped into a comma code which is defined as a coding scheme in which every codeword is terminated with the same comma pattern, such as a 1. This allows a direct coding and decoding of the n-bit positive integer binary digital data differences without the use of codebooks.