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AUDIO CODING STANDARDS - MP3
http://www.mp3-tech.org/programmer/docs/AudioCoding.pdf
Table 1 Comparison of ISO/MPEG audio coding standards 2.1 MPEG-1 The MPEG-1 standard consists of three layers of audio coding schemes with increasing complexity and subjective performance. These layers were developed in collaboration mainly with AT&T, CCETT, FhG/University of Erlangen, Philips, IRT, and Thomson Consumer Electronics.
Audio Coding and Standards - Hosei
https://jianhua.cis.k.hosei.ac.jp/course/mm/Lesson03.pdf
G.72x Audio Coding Standards • Silence Compression - detect the "silence", similar to run-length coding • Adaptive Differential Pulse Code Modulation (ADPCM) e.g., in CCITT G.721 -- 16 or 32 Kb/s. –(a) Encodes the difference between two or more consecutive signals; the difference is then quantized hence the loss (speech quality becomes worse)
~yao Yao Wang Audio Coding - New York University
https://eeweb.engineering.nyu.edu/~yao/EE3414/audio_coding.pdf
MPEG Digital Audio Coding Standards ©Yao Wang, 2004 EE3414: Audio Coding 23 Subband Filtering for Layer 3 • In order to achieve a higher frequency resolution closer to critical band partitions, the 32 subband signals are subdivided further in frequency content by applying, to each of the subbands, a 6- or
INTRODUCTION TO DIGITAL AUDIO CODING AND STANDARDS
http://www.gbv.de/dms/ilmenau/toc/356429318.PDF
PART II: AUDIO CODING STANDARDS Chapter 11. MPEG-1 AUDIO 1. Introduction 265 2. Brief History of MPEG Standards 266 3. MPEG-1 Audio 268 4. Time to Frequency Mapping 273 5. MPEG Audio Psychoacoustic Models 278 6. MPEG-1 Audio Syntax 296 7. Stereo Coding 307 8. Summary 310 9. References 310 Chapter 12. MPEG-2 AUDIO 1. Introduction 315 2.
AUDIO CODING: BASICS AND STATE OF THE AR T
http://www.eeng.dcu.ie/~ee502/AudioCodingBasics.pdf
Layer-2, Layer-3 and Advanced Audio Coding) has delivered on the promise to establish universally applicable standards. MPEG-1 MPEG-1 is the name for the first phase of MPEG work, started in 1988, and finalized with the adoption of ISO/IEC IS 11172 in late 1992. The audio coding part of MPEG-1 (ISO/IEC IS 11172-3,
Audio Fundamentals, Compression Techniques & Standards
http://ce.sharif.edu/courses/91-92/2/ce873-1/resources/root/Class%20Notes/MMN-lec3-Audio-911121.pdf
Audio Digitization Step1. Sampling divide the horizontal axis (time dimension) into discrete pieces. Uniform sampling is ubiquitous (everywhere at once). 9 Nyquist Theorem Suppose we are sampling a waveform. How often do we need to sample it to figure out its frequency? Signals can be decomposed into a sum of sinusoids.
(PDF) Introduction to digital audio coding and standards ...
https://www.researchgate.net/publication/3338750_Introduction_to_digital_audio_coding_and_standards_Book_Review
Introduction to Digital Audio Coding and Standards, Kluwer Academic Publishers, 2002, $125.00, 458 pp., ISBN 1-4020-7357-7. C ompression technologies are …
Lecture 7: Audio compression and coding
https://www.ee.columbia.edu/~dpwe/e6820/lectures/L07-coding.pdf
Aside: Coding standards Coding only useful if recipient knows the code! Standardizatione orts are important Federal Standards: Low bit-rate secure voice: I FS1015e: LPC-10 2.4 Kbps I FS1016: 4.8 Kbps CELP ITU G.x series (also H.x for video) I G.726 ADPCM I G.729 Low delay CELP MPEG I MPEG-Audio layers 1,2,3 (mp3) I MPEG 2 Advanced Audio Codec (AAC)
Digital Audio Standards - Audio Engineering Society
https://www.aes.org/aeshc/docs/aeshist/standards.hist/digital.standards/jaes26-1.pdf
audio frequency response required and what is economical to achieve in the anti-aliasing filter. If 20 kHz is chosen as the upper audio band edge and a filter with a sharp cutoff is used, it is possible to have a minimum sampling frequency of 45 kHz. If the recorder must have a +lo% speed change and the standard sampling frequency is 50 kHz,
Introduction to Digital Audio Coding and Standards ...
https://link.springer.com/book/10.1007/978-1-4615-0327-9
PDF About this book Introduction Introduction to Digital Audio Coding and Standards provides a detailed introduction to the methods, implementations, and official standards of state-of-the-art audio coding technology. In the book, the theory and implementation of each of the basic coder building blocks is addressed.
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