Modérateur : Les Modérateurs
tazz a écrit :Déja pour toutes les platines vendues après octobre seront compatible bd-j 1.1 (2.0 ?) avant, c'est cuit (cuit) il me semble.
tazz a écrit :Extrait choisi : "Compared to the BD-P1000, it's a huge improvement"
shacard a écrit :Faut dire que le testeur n'a pas eu de bol avec sa BD-P1000 qui refusait de lire une grande majorite de disque
tazz a écrit :Quel est l'intérêt et puisqu'il a moyen de mettre la main sur une platine quasiment parfaite (la meilleure image que j'ai pu voir en brd) pour une somme modique...
shacard a écrit :Faut dire que le testeur n'a pas eu de bol avec sa BD-P1000 qui refusait de lire une grande majorite de disque
Ca, c'est arrivé à bien des types... et ça fait partie des critères d'évaluation d'une machine (à fortiori lors d'un test )
shacard a écrit :- pas de decodage des formats audio HD (donc platine muette si un blu-ray ne propose que des pistes HD)
Camui a écrit :BangoO, je t'aime.
BangoO a écrit :Rassure moi, elle lit quand meme les pistes sons PCM ?
shacard a écrit :Comment a-t-il pu avoir un 5.1 en sortie analogique depuis une piste DTS-HD puisque le Samsung n'a pas de decodeur DTS-HD ?
Camui a écrit :BangoO, je t'aime.
magneto a écrit :question: est-il prévu que les lecteurs laissent les futurs amplis HD décoder et non pas en interne?
je crois que Toshiba devrait bientôt le faire.
merci
Soundtracks on HD DVD (and eventually on Blu-ray, when it goes interactive) operate very differently than they do on DVD. With current DVDs, you need entirely separate soundtracks for things like foreign languages and filmmaker's commentary. This is actually a pretty wasteful approach.
With HD DVD, soundtracks can be authored in the 'Advanced' mode, which allows multiple content streams to be live-mixed (mixed in real time). You don't need another soundtrack for foreign languages. Just swap out the English centre channel stream with one of the foreign centre channel streams. You don't need another soundtrack for commentary. Just reduce the level of the main soundtrack and mix in the commentary stream. Same with button sounds and other interactive features, like picture-in-picture.
Just like editing the document requires unzipping the file first, doing any of this live-mixing to the soundtrack requires decoding it to linear PCM first. This is why it has to be done in the player. They're not going to transmit every option to your receiver, just one soundtrack. You choose what you want to hear, it is mixed in the player (i.e. the soundtrack you want to hear is literally built in real time inside the player) and transmitted as a final mix to your receiver.
Current HDMI allows 8 channels of 96/24 PCM to be transmitted (more than enough resolution for any soundtrack), but not the new codecs in their native form. When HDMI 1.3 arrives, it will allow the new codecs mentioned above to be transmitted in their native bitstream, but only if they were authored in 'Basic' mode (no interactivity). If the soundtrack was authored in Advanced mode, then it cannot be transmitted in undecoded form; decoding in the player is mandatory because of live mixing.
So far, all HD DVD soundtracks have been authored in Advanced mode. Which means nothing will change when new receivers arrive on the market. Despite having HDMI 1.3 transmission and decoders built into the receiver, decoding will still have to take place in the player.
Currently, Blu-ray discs are authored in Basic mode, since they haven't gotten interactivity yet. As soon as BD Java is up and working, they'll all be authored in Advanced mode too. At that point, what are the decoders in the receivers going to do? Decode the relatively few BD titles that were released before interactivity? Most of those titles will be re-issued anyway.
Personally, I'm glad that decoding is shifting to the player. I wish it had always been that way. Since receivers need the data in PCM form anyway, that's what every player should be outputting (irrespective of what format is used to store the data on the disc). As mentioned before, when new audio codecs and formats arrive, you'll have to buy a new player. But as long as the players keep outputting the audio in PCM form, current receivers will always remain compatible with anything that shows up in the future. How elegant is that!
Camui a écrit :BangoO, je t'aime.
Revenir vers « Sources/Lecteurs »
Utilisateurs parcourant ce forum : Aucun utilisateur inscrit et 19 invités