Bit condensation is defined as the process of reducing the number of bits in a digital audio signal to meet storage requirements. A primary application is to reduce 20 or more bit data to the 16-bit Compact Disc format. Sonic and practical objectives for this process are presented, along with a discussion of three basic approaches: additive dither, subtractive dither and noise-shaping. An additive dither variant developed by Apogee is described. It yields the statistical benefits of additive dither, but without its noise floor penalty.
Click to purchase paper as a non-member or login as an AES member. If your company or school subscribes to the E-Library then switch to the institutional version. If you are not an AES member and would like to subscribe to the E-Library then Join the AES!
This paper costs $33 for non-members and is free for AES members and E-Library subscribers.