Method and system for reducing signal distortion in a continuously variable slope delta modulation scheme
First Claim
1. A rearview assembly for a vehicle, said rearview assembly comprising:
- a mounting structure for attaching to a vehicle, said mounting structure comprising a housing;
a rearview element disposed in said housing for providing the driver with a view to the rear of the vehicle;
a continuously variable slope delta encoder module disposed on or within said mounting structure, wherein said continuously variable slope delta encoder module is configured to generate a feedback signal;
a pre-processing module disposed on or within said mounting structure, wherein said pre-processing module is configured to receive a source signal, a feedback signal and a first filtered signal from a first filter to generate a pre-processed signal that is a function of the source signal and the feedback signal, and to supply the pre-processed signal to said continuously variable slope delta encoder module, andwherein said continuously variable slope delta encoder module generates the feedback signal as a function of the pre-processed signal received from said pre-processing module.
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Accused Products
Abstract
A rearview assembly includes a mounting structure for attaching to a vehicle. The mounting structure includes a housing that has a rearview element disposed inside for providing a driver of the vehicle with a view to the rear of the vehicle. The rearview assembly also includes a continuously variable slope delta encoder module in or on the mounting structure configured to generate a feedback signal. The rearview assembly also includes a pre-processing module on or within the mounting structure. The pre-processing module is configured to process a source signal and the feedback signal from the continuously variable slope delta encoder module, and to provide a pre-processed signal to the continuously variable slope delta encoder module based on the value of the source signal and the feedback signal.
17 Citations
64 Claims
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1. A rearview assembly for a vehicle, said rearview assembly comprising:
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a mounting structure for attaching to a vehicle, said mounting structure comprising a housing; a rearview element disposed in said housing for providing the driver with a view to the rear of the vehicle; a continuously variable slope delta encoder module disposed on or within said mounting structure, wherein said continuously variable slope delta encoder module is configured to generate a feedback signal; a pre-processing module disposed on or within said mounting structure, wherein said pre-processing module is configured to receive a source signal, a feedback signal and a first filtered signal from a first filter to generate a pre-processed signal that is a function of the source signal and the feedback signal, and to supply the pre-processed signal to said continuously variable slope delta encoder module, and wherein said continuously variable slope delta encoder module generates the feedback signal as a function of the pre-processed signal received from said pre-processing module. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A system for reducing signal distortion in a device employing a continuously variable slope delta modulation scheme, comprising:
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a continuously variable slope delta encoder module, wherein said continuously variable slope delta encoder module is configured to generate a first filtered signal and a feedback signal; and a pre-processing module, wherein said pre-processing module is configured to receive a source signal, the feedback signal and the first filtered signal to generate a pre-processed signal that is a function of the source signal and the feedback signal, and to supply the pre-processed signal to said continuously variable slope delta encoder module, and wherein said continuously variable slope delta encoder module generates the feedback signal as a function of the pre-processed signal received from said pre-processing module. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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32. An audio/data transceiver device, comprising:
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a continuously variable slope delta encoder module, wherein said continuously variable slope delta encoder module is configured to generate a feedback signal and a first filtered signal from a first filter; a pre-processing module, wherein said pre-processing module is configured to receive a source signal, feedback signal and the first filtered signal from said continuously variable slope delta encoder module to generate a pre-processed signal that is a function of the source signal and the feedback signal, and to supply the pre-processed signal to said continuously variable slope delta encoder module, wherein said continuously variable slope delta encoder module generates the feedback signal as a function of the pre-processed signal received from said pre-processing module; and a wireless audio/data transceiver coupled to at least one of said continuously variable slope delta encoder module and said pre-processing module. - View Dependent Claims (33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46)
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47. A method for reducing distortion in a system employing continuously variable slope delta modulation (CVSD), comprising the steps of:
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providing a continuously variable slope delta encoder module that encodes an input signal; providing a source signal for encoding by said continuously variable slope delta encoder module; generating a feedback signal in said continuously variable slope delta encoder module; altering the source signal based on a first filtered signal and the feedback signal generated in said continuously variable slope delta encoder module to provide a pre-processed signal; and providing the pre-processed signal, the integrated signal and the first filtered signal as the input signal to said continuously variable slope delta encoder module. - View Dependent Claims (48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63)
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64. A continuously variable slope delta encoder system for reducing signal distortion in an electronic device comprising:
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a comparator; an integrator for providing an integrated signal; at least one filter for providing a filtered signal; a pre-processing module configured to receive a source signal, integrated signal and the filtered signal for generating a pre-processed signal that is a function of the source signal and the integrated signal; and wherein the pre-processed signal and the integrated signal are supplied to the comparator for generating a feedback signal that is a function of the pre-processed signal received from the pre-processing module.
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Specification