Batch processing control of volume events in a digital amplifier environment
First Claim
1. A digital audio receiver, comprising:
- a digital audio processor for receiving a datastream corresponding to an audio signal, and for generating a first output signal corresponding to a first audio channel;
a user input interface, for receiving volume commands;
a system controller for receiving volume commands from the user input interface; and
a volume command processor, coupled to the digital audio processor and to the system controller, for controlling the digital audio processor to generate the first output signal at a selected volume level, comprising;
a timer, for measuring a selected time duration; and
volume control circuitry, coupled to the system controller and the timer, for issuing a ramping volume level control signal responsive to the timer measuring the selected time duration during which no additional volume command is received at the interface.
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Accused Products
Abstract
A digital audio-visual receiver (10) with improved digital control of audio volume is disclosed. Upon receipt of a user volume command, via a front panel (25) or a remote control and infrared receiver (27), sequential logic (36) in a volume command processor (35) in a PWM audio processor (20) of the receiver (10) initiates a timer (38), which measures or counts a selected interval. If additional volume commands are received during the interval, sequential logic (36) resets and restarts the timer (38). Upon the timer (38) interval elapsing without another volume command, the volume command processor (35) generates a ramping volume output signal to reach the volume level of the last received volume command over a selected time duration. Audible artifacts during changes in audio volume are thus avoided.
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Citations
21 Claims
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1. A digital audio receiver, comprising:
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a digital audio processor for receiving a datastream corresponding to an audio signal, and for generating a first output signal corresponding to a first audio channel;
a user input interface, for receiving volume commands;
a system controller for receiving volume commands from the user input interface; and
a volume command processor, coupled to the digital audio processor and to the system controller, for controlling the digital audio processor to generate the first output signal at a selected volume level, comprising;
a timer, for measuring a selected time duration; and
volume control circuitry, coupled to the system controller and the timer, for issuing a ramping volume level control signal responsive to the timer measuring the selected time duration during which no additional volume command is received at the interface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of controlling the volume in a digital audio system, comprising:
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responsive to receiving an audio volume command, initiating a timer to measure a selected time interval;
responsive to receiving another audio volume command, restarting the timer;
responsive to the timer measuring the selected time interval, generating a volume ramp control signal responsive to a most recently received audio volume command; and
applying the volume ramp control signal to a digital audio processor. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21)
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Specification