Angelus a écrit:Bonsoir à tous!
Bon, j'ai une question vitale à vous poser concernant le DTS :
pourquoi est ce que cohabitent (sur le net) deux couples de valeurs différents quand on parle de DTS ,à savoir :
- Mi-débit: 754 kbps ET 768 kbps
- Plein débit: 1509 kbps ET 1536 kbps
Bonjour,
D'après ce que j'ai lu sur le site de DTS, le DTS a donc un debit de 1509 kbit/s (ça on savait), et c'est le DTS 96/24 qui a un debit de 1536 kbit/s.
DTS (FAQ) a écrit:9. How Does 96/24 Work?
The DTS coding system has a “core + extension” structure. The “core” represents the DTS data as has been known since the first home decoders. The “extension” can carry data for future applications or enhancements of any sort. All DTS decoders recognize and use the core data. Basic decoders ignore the extension data, while advanced decoders can make use of it. This allows for full backward compatibility for any scheme using the extension. DTS has recently used the extension field for two purposes. In the first case, it has been used to carry an additional channel for 6.1 dis-crete. In the second case, the extension field carries the additional spectral data added by 96-kHz sampling. For a program in DTS 96/24, existing decoders read the core at 48-kHz and reproduce the standard spectrum. DTS 96/24 decoders read both core and extension and reproduce the extended spectrum. The data rate for 96/24 is 1.536Mbit/s, the higher of the two DTS rates presently used. While numerically this might suggest twice as much compression, there is in fact negligible additional compres-sion on the core data. This is because there is relatively little information in the range 24-48kHz, so it can be coded very compactly. The 96/24 stream passes through the S/PDIF just as standard DTS does.
Voir la FAQ DTS
C'est peut-être aussi la même différence qu'il y a donc entre le 754 kbit/s (DTS mi-débit) ET 768 kbit/s (DTS96/24 mi-débit) ?
Laurent
Ya un hic
