Equalization based on encoded audio metadata

A metadata and audio technology, applied in the field of equalization based on encoded audio metadata, can solve problems such as the influence of the listener's tone balance

Active Publication Date: 2020-04-17
APPLE INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, when a previously mixed recording (of some audio content) is subsequently presented in a different acoustic environment or from a different listener perspective, the tonal balance heard by the listener can be affected

Method used

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  • Equalization based on encoded audio metadata
  • Equalization based on encoded audio metadata
  • Equalization based on encoded audio metadata

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Embodiment Construction

[0016] Several implementations will now be described with reference to the accompanying figures. Although numerous details are set forth, it is understood that some embodiments of the invention may be practiced without these details. In other instances, well-known circuits, structures and techniques have not been shown in detail in order not to obscure the understanding of this description.

[0017] figure 1 Shown are examples of components that make up a computer system that performs encoding-level processing of a digital audio recording and a computer system that performs decoding-level processing of the digital audio recording. It should be understood that although figure 1 An exemplary processing chain (either at the decode level or the playback level) including EQ, dynamic range control (DRC) and downmix blocks is shown, but not all of these are required in a given embodiment of the invention or at the playback device's exists in a given instance. Also, metadata for a...

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Abstract

The present invention provides a system for producing an encoded digital audio recording, the system having an audio encoder that encodes a digital audio recording having a plurality of audio channels or audio objects. An equalization (EQ) value generator generates a sequence of EQ values ​​defining the EQ filtering to be applied when decoding the encoded digital audio recording, wherein the EQ filtering is to be applied independently of any downmixing A group of one or more of said audio channels or audio objects applied to said recording. A bitstream multiplexer combines the encoded digital audio recording with the sequence of EQ values ​​as metadata associated with the encoded digital audio recording. A system for decoding encoded audio recordings is also described.

Description

[0001] This non-provisional patent application claims the benefit of the earlier filing date of provisional application 62 / 199,634, filed July 31, 2015. technical field [0002] Embodiments of the present invention generally relate to the encoding and decoding of audio signals, and the use of metadata associated with encoded signals during playback of decoded signals to improve playback quality in various types of consumer electronics end-user devices. Other embodiments are also described. Background technique [0003] Digital audio content occurs in many contexts, including, for example, music and movie files. In most cases, audio signals are encoded, where the encoding is not necessarily for data rate reduction, but may simply be for format conversion so that the resulting media file or stream can be stored or transmitted, allowing a large number of deliveries or transmissions to occur simultaneously ( if required). Media files or streams can be received in different typ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B27/031G11B27/32H04S3/00H04S7/00
CPCG11B27/322G11B27/031H04S3/008H04S7/307G10L19/26H04S3/006G10L19/167G10L19/008H04S2400/15H04S2400/03H04S2400/13
Inventor F·鲍姆加特
Owner APPLE INC
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