Abstract: An audio-video (AV) playback chain and rendering peripheral device 300 for generating two or more interrupts 306, 308 with a programmable delay 304 between them. Such are configured to prevent two processors 310, 314 from racing to access the same system resources in their respective interrupt service routines.

Abstract: A system for amplifying a digital audio signal comprises a receiver 12 for receiving a digital audio signal, a level estimator 14 arranged to calculate the audio level of the digital audio signal, a gain control 16 arranged to receive a gain level, the gain level defining the desired amplification of the digital audio signal, a logic circuit 18 arranged to calculate the headspace in the digital audio signal and to divide the gain level into a scaling gain and an amplifier gain, the scaling gain not exceeding the calculated headspace, a digital signal processor 20 arranged to amplify the digital audio signal with the scaling gain, a digital-to-analogue converter 22 arranged to convert the amplified digital audio signal into an analogue signal, and an amplifier 24 arranged to amplify the analogue audio signal with the amplifier gain.

Abstract: This invention presents a method and a system for facilitating data entry for an information system comprising a repository. According to the method, firstly, a first input of some first category parameters input by the user is received by means of a first user interface. Secondly, a first ranked list of a plurality of second category parameters is generated on the basis of the first input and the repository, and the first ranked list is displayed to the user by means of a second interface. Then a second input including some second category parameters selected by the user is received by means of the second user interface. Lastly, a second ranked list of a plurality of first category parameters is generated on the basis of the second input and the repository, and the second ranked list is displayed to the user by means of the first interface. In this way, the user can correctly determine the input data for the information system so as to get a more accurate output.

Abstract: A system for amplifying a digital audio signal comprises a receiver 12 for receiving a digital audio signal, a level estimator 14 arranged to calculate the audio level of the digital audio signal, a gain control 16 arranged to receive a gain level, the gain level defining the desired amplification of the digital audio signal, a logic circuit 18 arranged to calculate the headspace in the digital audio signal and to divide the gain level into a scaling gain and an amplifier gain, the scaling gain not exceeding the calculated headspace, a digital signal processor 20 arranged to amplify the digital audio signal with the scaling gain, a digital-to-analogue converter 22 arranged to convert the amplified digital audio signal into an analogue signal, and an amplifier 24 arranged to amplify the analogue audio signal with the amplifier gain.

Abstract: A method and a device is presented for communicating a first data stream encoded according to a non-PCM format through a communication link that is designed communicating a data stream encoded according to a PCM format. The method and device receive a first data stream encoded according to a non-PCM format. The received data stream comprises a plurality of data-packets. The method and device pack the first data stream into a second data stream. The second data stream has plurality of data-packets. Each of the data-packets of the second data stream includes a discontinuity according to the PCM format. The second data stream is communicated through the link. A method and a device are further provided for receiving the second data stream via the link and for identifying the format of the received data stream by examining for the discontinuity.

Abstract: An audio-video (AV) playback chain and rendering peripheral device 300 for generating two or more interrupts 306, 308 with a programmable delay 304 between them. Such are configured to prevent two processors 310, 314 from racing to access the same system resources in their respective interrupt service routines.

Abstract: Pursuant to one aspect of the invention, a prefilter module that incorporates an inverse filter is used in conjunction with an encoder. The inverse filter has an inverse frequency response of a frequency response of a filter that simulates speech having transmission path characteristics, such as telephone-channel bandwidth speech, and/or noisy speech. The inverse filter is used to compensate transmission path characteristics of an input signal. The inverse filter can be designed using several methods, such as, for example, an autoregressive model or a moving average model. Pursuant to a second aspect of the invention, a parameter preprocessor is used in conjunction with a decoder. The parameter preprocessor performs pitch rectification through use of a medium and linear filter, and updates spectral amplitudes and voicing parameter depending on the pitch rectification.