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macos - Decompress wav file (Windows IMA ADPCM …
https://stackoverflow.com/questions/11253975/decompress-wav-file-windows-ima-adpcm-compression-in-objective-c
The compression code is 17 -- IMA ADPCM. I've found some source, but would prefer to use something built-in if it's accessible, especially since there are apparently several different variants of the algorithm. Do does anyone know of an API or such that can be used to do the decompression?
Implementing the ADPCM algorithm in STM32L1xx ...
https://www.st.com/resource/en/application_note/dm00109192-implementing-the-adpcm-algorithm-in-stm32l1xx-microcontrollers-stmicroelectronics.pdf
1.3 IMA ADPCM decompression The IMA ADPCM decompression algorithm compresses samples which are stored as 4-bit signed two’s complement values. The result is decompressed samples in linear 16-bit two’s complement format. The input sample (S q) is dequantized using an inverse qu antizer with an adapted step (q) to obtain a difference (Sd). To reduce quantization …
Speech and Sound Compression and Decompression …
https://www.ti.com/lit/pdf/slaa361
2 Compression and Decompression Algorithms The simplest way to make a voice recorder is to store the analog-to-digital conversion results (for example, 12-bit samples) directly in the flash memory. Most of the time, the audio data does not use the complete ADC range, which means that redundant information is stored in the flash memory.
Digital Audio Compression - Columbia University
https://www.ee.columbia.edu/~dpwe/papers/Pan93-acomp.pdf
Other ADPCM audio compression schemes include the CCITT Recommendation G.721 (32 kilobits per second compressed data rate) and Recommendation G.723 (24 kilobits per second compressed data rate) standards and the compact disc interactive audio compression algorithm.[7,8] The IMA ADPCM Algorithm. The IMA is a consor-
Adaptive Differential Pulse Code Modulation Using PICmicro ...
https://ww1.microchip.com/downloads/en/AppNotes/00643b.pdf
rithm. The data format is 8.0 kHz, mono, 4-bit ADPCM. Essentially, the compression and decompression use an adaptive quantization with fixed prediction.The adaptive quantization are based on a table lookup first developed by Intel/DVI for the IMA. Appendix D gives the inf ormation about IMA and the supporting documentation for IMA ADPCM. TABLE 3: DIGITAL …
Compression and Decompression - BrainKart
https://www.brainkart.com/article/Compression-and-Decompression_10195/
AUDIO COMPRESSION . Audio consists of analog signals of varying frequencies. The audio signals are converted to digital form and then processed, stored and transmitted. Schemes such as linear predictive coding and adaptive differential. pulse code modulation (ADPCM) are utilized for compression to achieve 40-80% compression. FRACTAL COMPRESSION
Using PICfi Microcontrollers
https://ww1.microchip.com/downloads/aemtest/adpcm-and-speex-audio-library/00643c.pdf
note were derived from the IMA ADPCM Reference Algorithm. The data format is 8.0 kHz, mono, 4-bit ADPCM. Essentially, the compression and decompression use an adaptive quantization with fixed prediction. The adaptive quantization is based on a table look up first developed by Intel DVI for the IMA. Appendix D: fiInteractive Multimedia Association Informationfl remains to show …
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