Integrated multimedia signal processing system using centralized processing of signals

摘要

Integrated processing of multimedia signals can eliminate unnecessary signal processors and converters without losing the functionality of typical home entertainment system components. The integrated multimedia system includes a main player that captures and processes signals digitally. The main player may adjust the audio signal to provide audio output of equal loudness across all frequencies by accounting for sensitivity of the human ear for sounds of varying frequencies. The main player can also account for perceived differences in loudness based on the angle of a listener to a speaker by detecting the position of a user and making an adjustment accordingly. The invention further provides a speaker that has embedded performance characteristics or an identifier that allows the system to provide an optimal speaker driving current for a particular system or determine how that speaker would be best implemented in the integrated system.

主权项

1. An integrated audio processing system, comprising:
an audio source; an amplifier configured to generate a plurality of speaker driving currents in response to a plurality of speaker driving signals; a plurality of dummy speakers directly driven by the plurality of speaker driving currents, each dummy speaker comprising a plurality of speaker units and not containing any analog cross-over network; an input device configured to provide listener position information comprising a measured horizontal angle and a measured vertical angle between the listener and one of the dummy speakers; a central processing unit adapted to be responsive to an audio signal from the audio source; and a digital volume control module comprising:
a frequency separation module configured to separate the audio signal into a plurality of frequency ranges;a reference data module configured to provide reference data comprising information regarding human sensitivity to sound pressure level corresponding to each frequency range and the angle between the listener and one of the dummy speakers in a range of 0° to 30°; anda signal adjusting module configured to independently adjust each frequency range of the separated audio signal based on the reference data, wherein: the digital volume control module is configured to independently adjust each of the frequency ranges of the audio signal to provide an equal-loudness level for all of the frequency ranges of the audio signal at the position of the listener based on the listener position information provided to the digital volume control module by the input device; and the frequency separation module is configured to separate the audio signal based on the reference data, and to separately provide each of the speaker units with one of the speaker driving signals containing one of the frequency ranges which differs from the frequency ranges provided to the other driver units.