Inference and correction of automatic gain compensation

A time-varying gain, audio signal technology, used in gain control, amplification control, compression/expansion of the volume of non-tuning/low frequency amplifiers, etc. Improved fidelity, reduced effect of loud channels

Pending Publication Date: 2020-06-26
DOLBY INT AB
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These devices may lack an interface for applications running on said device to adjust system-level A...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Inference and correction of automatic gain compensation
  • Inference and correction of automatic gain compensation
  • Inference and correction of automatic gain compensation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] Example device

[0021] figure 1 is a diagram illustrating an example device 102 that implements AGC inference and correction. Device 102 is a computing device that includes one or more processors. For example, device 102 may be a mobile device, such as a tablet computer or a smartphone. Device 102 may be coupled to (eg, include or be connected to) a microphone 104 and a speaker 106 . In various embodiments, device 102 may be coupled to multiple microphones and speakers. For example, device 102 may plug into a stereo microphone and speakers, or connect wirelessly to a stereo microphone and speakers. Device 102 is configured to record the audio content of event 108 . Event 108 may be any event in which audio content (eg, voiced, vocal, or instrumental) is produced. For example, event 108 may be a live performance event, such as a concert, in which one or more instruments and / or one or more vocalists perform.

[0022] During recording, device 102 emits a series of...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

Methods, systems, and computer program products that infer and correct automatic gain compensation (AGC) values over time are described. A device emits a series of inaudible reference audio signals during recording. The reference audio signals have a constant amplitude. A microphone of the device records the reference audio signals while recording audio content. The device may apply AGC during therecording. An AGC inference module receives the recorded signals and extracts a representation of the reference audio signals, which have been subject to the AGC. The AGC inference module determinesvariations in levels of the extracted representation of the reference audio signals over time. Based on the variations, the AGC inference module infers the AGC applied to the recording over time. TheAGC inference module can then provide the AGC for reading, or undo effects of the AGC applied to the audio content.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to the following priority applications: ES patent application P201731153 (ref: D17024ES) filed September 27, 2017 and US provisional application 62 / 591,258 filed November 28, 2017 (ref. Document: D17024US) and EP application 17204135.2 (Reference: D17024EP) filed on November 28, 2017, which are hereby incorporated by reference. technical field [0003] The present invention generally relates to audio signal processing. Background technique [0004] Systems that implement automatic gain compensation (AGC), also known as automatic gain control, receive variable signal levels as inputs and provide adjusted (eg, flattened) signal levels as outputs. In general, AGC has the effect of reducing strong signals and enhancing weak signals. AGC may be desirable in some applications (eg, voice recording), but not in some applications (eg, music recording). Some modern mobile devices (eg, some sm...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H03G3/00H03G3/30H03G7/00
CPCH03G3/005H03G3/3005H03G7/002H03G2201/103H04R3/00H04R29/001
Inventor G·真加勒A·马特奥斯·索莱
Owner DOLBY INT AB
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap