The conversion to the Arduino Library format was quite easy: I just needed to put all relevant code under the src directory. I used the latest current release version 3.100 which can be downloaded from Sourceforge as starting point. It is considered as one of the best MP3 encoder at mid-high bitrates and at VBR. Unlike common speech coders, the achieved coding quality scales up with bitrate, and transparent quality can be achieved. LAME is a high quality MPEG Audio Layer III (MP3) encoder licensed under the LGPL. This way, AAC-LD bridges the gap between speech coding schemes and high quality audio coding schemes. It features an algorithmic delay of only 20 ms while offering good compression ratios and high sound quality audio quality for all kinds of audio signals including speech, music and atmospheric sounds. The codec is closely derived from MPEG-4 Advanced Audio Coding (AAC-LC). It has achieved wide acceptance in high end video conference terminals and is used in professional broadcasting applications. The MPEG-4 Low Delay Audio Coder is designed to combine the advantages of perceptual audio coding with the low delay necessary for two-way communication. Low Delay Advanced Audio Coding (AAC-LD) is the high-quality low-delay audio coding standard within MPEG-4. AAC offers multiple profiles/object types to meet the requirements of a wide range of applications making it one of the most popular audio compression standards across wide spectrum of application ranging from portable player, cell phones, music systems, to the internet.ĪAC-LD C64x+ / C66 / C674x CPU Utilization & Memory RequirementsĪll Memory usage is given in units of byte. It supports the coding of multi-channel audio, with up to 48 main channels and 16 low-frequency channels. AAC provides both a higher quality and superior performance than MP3 at the same bit rate. The encoder/decoder is an implementation of the MPEG-2 (ISO/IEC 13818-3) and MPEG-4 (ISO/IEC 14496-3) standard. It provides the highest possible quality at smaller bit-rates. This coding technique uses a perceptual filter bank, a sophisticated masking model, noise-shaping techniques, and channel coupling. The AAC-LC (Advanced Audio Coding – Low Complexity) is a natural audio coding algorithm that can handle 48 channels and sample rates up to 96kHz. Texas Instruments – TI TMS320C6000 C64x, C64x+, C674xĪDT AAC LC is available on the above Platforms: Other configurations are available upon request.
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