Prologic decoder software library module
- The Dolby Pro Logic decoder library supports
decoding of surround audio using the Dolby Prologic standard.
Dolby Prologic Surround is an audio coding technique that enables
the transmission and storage of multichannel audio in a
stereo-compatible way. This is achieved by a mix of four channels
into two at the encoder side. As a result, the Pro Logic encoded
audio can be listened to whether a Pro Logic decoder is present or
not. This is not the case for digitally compressed audio like MPEG
or AC-3 (Dolby Digital). In such cases a decoder is required for
listening to the audio.
- Dolby Prologic audio surround decode
- optional autobalance control
- 'wide surround' mode
- compatible with TriMedia Software Development
- supported by pSOS+ real-time operating system
- Dolby Pro Logic Surround is widely used for VHS
cassettes, laser disks, PC games and TV applications. It allows
for movie theatre 3D sound positioning in a home environment.
Dolby Pro Logic Surround will continue to play an important role
in the future even though the digital compression algorithms like
AC-3 and MPEG multichannel provide a better channel separation and
require less transmission bandwidth. AC-3 for instance explicitly
supports a special Pro Logic two channel coding mode and it is a
requirement for certain AC-3 decoder products to be capable to
decode Pro Logic as well.