Perceptual Coding of High Quality Digital Audio

Brandenburg, Karlheinz

doi:10.1007/0-306-47042-x_2

Cited by 20 publications

(26 citation statements)

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“…A key technology that plays fundamental role in spatial audio delivery is perceptual audio coding [2][3][4][5]. Based on knowledge on psychoacoustic, perceptual audio coding has been developed to be capable of incredibly compressing the size of audio data in that the audio signal properties which would not detected by our hearing system are just removed.…”

Section: Introductionmentioning

confidence: 99%

Reviews on Technology and Standard of Spatial Audio Coding

Elfitri

Luthfi²

2017

JNTE

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Market demands on a more impressive entertainment media have motivated for delivery of three dimensional (3D) audio content to home consumers through Ultra High Definition TV (UHDTV), the next generation of TV broadcasting, where spatial audio coding plays fundamental role. This paper reviews fundamental concept on spatial audio coding which includes technology, standard, and application. Basic principle of object-based audio reproduction system will also be elaborated, compared to the traditional channel-based system, to provide good understanding on this popular interactive audio reproduction system which gives end users flexibility to render their own preferred audio composition.

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Section: Introductionmentioning

confidence: 99%

Reviews on Technology and Standard of Spatial Audio Coding

Elfitri

Luthfi²

2017

JNTE

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“…In 1993, the human ear perceptual mechanism was introduced to coding and perceptual audio coding technology MPEG1-audio layer 3 (MP3) based on a psychoacoustic model was proposed to eliminate redundant inner-channel information. MP3 technology utilizes auditory masking effects and subband coding technology to maintain each sub-band quantification noise below the hearing threshold, thus achieving transparent quality with low bit rates [11]. Traditional monophonic audio compression coding technology achieves very high compression efficiency of perceptual transparency coding at 2 bit each sampling point by removing perceptual redundancies in combination with information redundancy removal techniques such as entropy coding.…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional audio parametric encoding based on perceptual characteristics of spatial cue1

Zhang¹,

Wang²

2015

IFS

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Abstract. Three-dimensional sound effects require a considerable number of sound channels, causing audio-visual spatial orientation sense distortion under circumstances in which the code rate is restricted by the limitation of transmission channel bandwidth and storage capacity. As a result, existing 3D audio systems are incompatible with real-time broadcasting and home theatre applications, severely limiting the application and development of 3D audio systems. By investigating the mechanism of orientation parameters perceptual redundancy, this paper studied 3D spatial orientation cue perceptual characteristics, established an orientation cue perceptual model, developed a heterogeneous quantification table accordingly, and controlled the differences between each quantified value below the quantitative value perception threshold. Using this method, only the information perceptible to the human ear was quantified and perceptual distortions were minimized. The experimental results revealed that, compared to the SLQP method, the quantified bit of the proposed method was reduced by 8.66% in low resolution and 65.23% in high resolution. In addition, the accuracy of this method was higher than that of the SLQP method, enabling better alignment with human perceptual characteristics.

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“…Considering the growing demand for the reliable delivery of high quality multichannel audio in various multimedia applications such as home entertainment, digital audio broadcasting, computer games, music streaming services as well as teleconferencing, efficient coding techniques [1]- [3] have become essential for advanced audio processing. The traditional approach for compressing multichannel audio is to encode each audio channel using a mono audio coder, such as Dolby AC-3 [4] and MPEG advanced audio coder (AAC) [5], [6].…”

Section: Introductionmentioning

confidence: 99%

Investigation on objective performance of closed-loop spatial audio coding

Elfitri

Kurnia

Fitrilina

2014

2014 6th International Conference on Information Technology and Electrical Engineering (ICITEE)

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Closed-loop spatial audio coding is a compression technique, developed based on MPEG Surround (MPS) standard, having an advantage of minimising distortion due to quantisation process of spatial parameters. Despite the MPS is developed based on filterbank, however, this closed-loop system performs better on Modified Discrete Cosine Transform (MDCT). Considering its high performance over the open-loop system, this paper presents further investigation on objective performance of closedloop spatial audio coding against various quantisers of spatial parameters. Experiments have been conducted to measure signal to noise ratio (SNR) across different types of uniform spatial quantisers at various operating bitrates. The results show that the SNR achieved by the open-loop approach is strongly affected by the type of the quantiser while, in contrast, the SNR achieved by the closed-loop approach is relatively constant regardless the number of bits used in the quantisers. Moreover, the results also show that the closed-loop configuration can consistently improve SNR in any quantisation scheme.

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Perceptual Coding of High Quality Digital Audio

Cited by 20 publications

References 0 publications

Reviews on Technology and Standard of Spatial Audio Coding

Reviews on Technology and Standard of Spatial Audio Coding

Three-dimensional audio parametric encoding based on perceptual characteristics of spatial cue1

Investigation on objective performance of closed-loop spatial audio coding

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