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(PDF) Union of MDCT bases for audio coding - …
https://www.researchgate.net/publication/224338100_Union_of_MDCT_bases_for_audio_coding
This paper investigates the use of sparse overcomplete decompositions for audio coding. Audio signals are decomposed over a redundant union of …
Union of MDCT Bases for Audio Coding - INFONA
https://www.infona.pl/resource/bwmeta1.element.ieee-art-000004648210
Audio signals are decomposed over a redundant union of modified discrete cosine transform (MDCT) bases having eight different scales. This approach produces a sparser decomposition than the traditional MDCT-based orthogonal transform and …
Audio Compression Based on Discrete Cosine Transform, Run ...
http://www.ijeit.com/Vol%204/Issue%201/IJEIT1412201407_08.pdf
coding scheme based on discrete cosine transform (DCT) is proposed. The proposed system consists of audio normalization, followed by DCT transform, scalar quantization, improved run length encoding and a new high order shift coding. To reduce the effect of quantization noise, which is notable at the low energetic
Audio Signal Compression using DCT and LPC Techniques
http://ijettjournal.org/2015/volume-21/number-5/IJETT-V21P247.pdf
DCT Discrete Cosine Transform can be used for audio compression because of high correlation in adjacent coefficients. We can reconstruct a sequence very accurately from very few DCT coefficients. This property of DCT helps in effective reduction of data. used in DCT.
Audio Compression using DCT & CS - IJERT
https://www.ijert.org/research/audio-compression-using-dct-cs-IJERTV4IS010061.pdf
CS techniques to the compression of audio signals. We present a study on compressed sensing of real, non-sparse, audio signals. With the help of spectral analysis and properties of the DCT, we can treat audio signals as sparse signals in the frequency domain. CS has been traditionally used to compress certain sparse images.
FAST ALGORITHMS FOR MDCT AND USED IN AUDIO CODING …
https://rc.library.uta.edu/uta-ir/bitstream/handle/10106/921/umi-uta-2005.pdf?sequence=1
3 (MP3), MPEG-4 Advanced Audio Coding (AAC) for audio; proprietary audio codecs such as Dolby AC-3, and an open source audio codec called Ogg Vorbis [1-6]. Speech codecs are based on vocal tract modeling for redundancy removal using
Basics of DCT and Entropy Coding - Chinese University of ...
https://www.math.cuhk.edu.hk/~lmlui/J4DCT-Huff2009.pdf
+127 (The DCT has a gain of 8 at very low frequencies) • Hence the Huffman code table would have to be quite large. • JPEG adopts a much smaller code by using a form of floating-point representation, where Size is the base-2 exponent and Additional Bits are used to code the polarity and precise amplitude
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