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Multi-rate filter system

A filter and multi-rate technology, applied in frequency response correction, impedance network, signal processing, etc., can solve the problems of consuming hardware and software resources, increasing bandwidth coverage and complexity, etc.

Active Publication Date: 2014-09-10
CIRRUS LOGIC INT SEMICON
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, the resulting filter complexity can be challenging to implement in resource-constrained devices, as it may consume additional hardware and software resources due to increased bandwidth coverage and complexity
[0008] As the filter size and complexity increase to accommodate the additional signal spectrum, it becomes more challenging to tune the filter coefficients to produce the desired frequency response
Furthermore, as the size and complexity of digital filters increase, it becomes more challenging to apply adaptive, learning and / or optimization algorithms to the real-time adjustment of filter coefficients

Method used

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Embodiment Construction

[0040]Specific embodiments of the present disclosure are described below with reference to the accompanying drawings; however, the disclosed embodiments are merely examples of the present disclosure and may be embodied in various forms. Well-known functions or constructions are not described in detail to avoid obscuring the disclosure in unnecessary detail. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a basis for the claims and as a teaching for teaching one skilled in the art to implement the invention in substantially any appropriately specific structure. The representative basis of the present disclosure is employed differently. Throughout the description of the drawings, like reference numerals may designate similar or identical elements.

[0041] Consumer Electronics Devices (CED) refers to cellular phones (e.g., smartphones), tablets, laptops, portable media players, televisions, portable gam...

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Abstract

A multi-rate filter system is disclosed. More particularly, a computationally efficient multi-rate filter system for processing an audio stream on a consumer electronics device is disclosed. The multi-rate filter system includes a plurality of multi-rate filtering blocks, at least one block including a linear filter component. At least one multi-rate filtering block may include a nonlinear signal processing components. The multi-rate filter system may include a nonlinear functional block. A method of filtering a signal is also disclosed.

Description

[0001] Cross References to Related Applications [0002] This application claims U.S. Provisional Application No. 61 / 584,855, filed January 10, 2012, entitled "Multi-rate Filter System" by Erik Lindahl et al., and filed June 12, 2012 by Erik Lindahl et al. International application that is the benefit and priority of US Provisional Application No. 61 / 658,560 for "Multi-rate Filter System," which is hereby incorporated by reference in its entirety for all purposes. technical field [0003] This disclosure is directed to digital filters, and in particular, to multi-rate digital filters for audio signal processing. Background technique [0004] Throughout the world, mobile technologies and consumer electronic devices (CEDs) continue to expand in use and scope. Concurrent with the continued proliferation, there has been rapid technological advancement of device hardware and components, resulting in increased computing power and incorporation of new peripherals on devices, along...

Claims

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Application Information

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IPC IPC(8): H03H17/00
CPCH03H17/0261H03H17/0294H03H17/0621H03H17/0283H03H17/0223H04R3/04H04R2430/03H04R2430/00
Inventor 埃里克·林达尔卢德维格·林德布卢姆帕尔·贡纳斯·里斯贝里兰迪·托特
Owner CIRRUS LOGIC INT SEMICON
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