What is MPEG-4 Version 2 ?
A. In Version 2 Additional tools where added. Error robustness which consist of Error Resilience (ER) and Error Protection (EP), Bit Slice Arithmetic Coding (BSAC), AAC- Low Delay (AAC-LD), Harmonic and Individual Lines plus Noise (HILN) in stand alone mode as well as in combination with the parametric speech coding scheme HXVC .