MPEG-2/4 AAC-LC Encoder and Decoder

Ittiam AAC-LC (Advanced Audio Coding) encoder/decoder is an implementation of the MPEG-2 (ISO/IEC 13818-3) and MPEG-4 (ISO/IEC 14496-3) standard. MPEG-2/4 AAC is a standard for compressing/decompressing audio sampled at 8-96 Khz to bit-rates of 16-576 kbit/s. AAC provides higher quality than MP3 at the same bit rate. It supports the coding of multi-channel audio, with up to 48 main channels and 16 low-frequency channels. AAC offers multiple profiles/object types to meet the requirements of a wide range of applications.

Technical Specification

• Encoding and decoding of AAC-LC (Low Complexity) bit-streams
• Supports MPEG-2 optional tools : Intensity Stereo, Mid/side Stereo, Temporal Noise Shaping
• Supports MPEG-4 optional tools : Perceptual Noise Shaping (PNS), Long Term Predictor (LTP)
• Sampling Rate : 8 - 96 kHz
• Channels : 2
• Bit Rate : 16 - 576 kbps
• C callable API for initialization, decoding
• Full accuracy with ISO/IEC 13818 and ISO/IEC 14496 audio standards
• Multi-channel, Reentrant implementation
• Tested on a variety of AAC bit streams
• 16/24 bit PCM output / High sound quality
• Optimized implementation

Applications

• Digital Audio Broadcasting
• Portable Audio Systems
• Internet Streaming
• Internet Appliances
• Infotainment

Platforms

• Currently supported on ARM (ARM9E™, ARM11™), TI DM320™, TI C64x™ (TMS320C64x™), TI C64x+™/DaVinci™ (DM644x™)
• For further details contact mkt@ittiam.com