Unit Testing of ETSI Enhanced Aacplus General Audio Codec

The Enhanced aacplus codec(EAC) is specified in ISO standards. The standard converts an incoming MPEG 4 bitstream to pulse code modulation sample output. Thecoding makesuseofamethod forcodingaudio which is advanced(AAC), it makes use of a replica in the Spectral band (SBR) and parameters of speech in coding. The parametric coding facilitates low bitrates while encoding stereo. Error Concealment techniques used while coding minimize frame loss. The codec uses and encoder and a decoder. In this project code is available from ETSI which is compiled and tested on a linux machine. In the absence of real time testing the encoder uses a wav file as input which converts it into 3gp file format. This 3gp bitstream file is later used by the decoder to get back the original wav file. A series of typical wav files are identified as test stimulus. The recovered wav files are verified for correctness using three matlab scripts. Testing is performed meticulously to verify the correctness of the standard.