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Bitrate of the Dolby Digital?

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  • RBFilms
    replied
    Re: Bitrate of the Dolby Digital?

    Understanding the limitations of streaming, I greatly appreciate the fact that VUDU uses DD+ ... DTS-HD or DTSHD-MA would be better of course ... but I would prefer to see bandwidth go towards picture quality.

    Thank you VUDU for caring about Audio / Video Quality!

    Rich


    Originally posted by Hagen View Post
    Dolby defines the transcoding from DD+ to DD. The transcoding is always done to the highest bitrate supported by DD (i.e. 640kbit/s).

    We are using DD+ because it gives us better audio quality at lower bitrates than DD. And all our content is encoded with DD+.

    Hagen.

    Leave a comment:


  • HeadHodge
    replied
    Re: Bitrate of the Dolby Digital?

    Originally posted by NA9D View Post
    I can say I am not blessed with Julien's ears. I cannot hear the difference between 96k, 128k or 256k MP3s let along lossless.
    This is what Lossless Audio sounds to me.

    http://en.sevenload.com/videos/m38tR...n-Mighty-Mouse

    Leave a comment:


  • NA9D
    replied
    Re: Bitrate of the Dolby Digital?

    I can say I am not blessed with Julien's ears. I cannot hear the difference between 96k, 128k or 256k MP3s let along lossless. Of course, I also have a constant low level of tinnitus in my ears thanks to the fact that I was in a bar standing right next to their speaker stack when their DJ started pumping up the dance music after the Bulls won a play-off game (way back when Michael played). I've got decent hearing for picking up sounds and I like good sound, but I can't pick up the nuances like you can. That's impressive. I'm actually more sensitive to video artifacts and can pick those out in a heartbeat!

    Leave a comment:


  • redwein
    replied
    Re: Bitrate of the Dolby Digital?

    Wow Julien. It sounds like you have a very discriminating ear (I'm sure that's an understatement). I would think it would suck though, to not be able to tolerate, let alone enjoy anything less than near total perfection in anything, whether it's music, food or anything else for that matter. It seems like kind of what Monk says ("It's a blessing ... and a curse). I hope that you are able to enjoy your Vudu. I'd hate to think that you felt like it was "scratching on the blackboard" everytime you watched a movie.

    Leave a comment:


  • Julien
    replied
    Re: Bitrate of the Dolby Digital?

    Originally posted by HeadHodge View Post
    Well I thought we were by discussing the possibility of accessing XM radio streams via VUDU Labs with Dolby Digital, like Sonos does.

    Maybe you didn't get the memo (or maybe I forgot to post it).

    Now that I mention it, Sonos does a great job of streaming XM, Rhaspody, and Napster with great quality.

    Did I mention Sonos is a great product??

    Sonos is really cool !!!
    I prefer using my Mac Pro and Airports with my 400GB and growing of 99% lossless music from my CD collection and my iPhone as remote for 24/7 lossless music. Now that is a TRUE music server with *almost good as it gets audio qulity.

    *SA-CD and DVD-A's are technically as good as it gets which I have a few. I can't tolerate and rarely listen to lossy music. I even use lossless on my iPod and iPhone (which I listen to an average of more than an hour a day while working out and running).

    Leave a comment:


  • HeadHodge
    replied
    Re: Bitrate of the Dolby Digital?

    Originally posted by RonV View Post
    Hey...this is not DBS Forum or XMFan....lets talk about Dolby Digital.

    Well I thought we were by discussing the possibility of accessing XM radio streams via VUDU Labs with Dolby Digital, like Sonos does.

    Maybe you didn't get the memo (or maybe I forgot to post it).

    Now that I mention it, Sonos does a great job of streaming XM, Rhaspody, and Napster with great quality.

    Did I mention Sonos is a great product??

    Sonos is really cool !!!

    Leave a comment:


  • NA9D
    replied
    Re: Bitrate of the Dolby Digital?

    XM channel quality varies a lot from channel to channel. I was one of the first 50K customers and perhaps the quality is receiver dependent? My old Alpine XM receiver still sounds pretty darn good. I can't say I like all the Sirius stuff that's been added in but that's life. Maybe the channels I listen to use higher bit rates. I generally listen to Watercolors, Spa and the Classical channels. They all sound pretty decent, IMHO. Oh yeah, I guess most of what I listen to is Fox News. Audio there definitely suffers but that's the news so who cares. I've always been amazed at how good the audio does sound on XM given the incredibly low bit rates....


    Anyhow, here's hoping that Vudu will soon offer web audio streaming and local (my media) streaming...

    Leave a comment:


  • RonV
    replied
    Re: Bitrate of the Dolby Digital?

    Hey...this is not DBS Forum or XMFan....lets talk about Dolby Digital.

    Leave a comment:


  • aaronwt
    replied
    Re: Bitrate of the Dolby Digital?

    Some XM music channels I've listened to do have commercials

    Leave a comment:


  • HeadHodge
    replied
    Re: Bitrate of the Dolby Digital?

    Originally posted by aaronwt View Post
    I listen to XM regularly and the sound quality there is not very good. At one point they advertised it to be near CD quality, but that was a long time ago.
    I get XM channels with Directv and the sound quality sucks. Directv use to provide CD Music channels that were much better. I miss them.

    Also XM claims they are commercial free, but they're definitely not talk free. I wish they would just shut up and play music.

    Leave a comment:


  • aaronwt
    replied
    Re: Bitrate of the Dolby Digital?

    I listen to XM regularly and the sound quality there is not very good. At one point they advertised it to be near CD quality, but that was a long time ago. Now I don't hear anything on there that comes anywhere close to CD quality.
    But it is so convenient which is why I always listen to it when I'm in my vehicle that has an XM radio.

    But if I compare a song on XM to a lossless track, or even a 192kbs WMA track on my ZUne, the XM song doesn't sound anywhere near as good as what is coming from my Zune player. It's like the upper frequencies are truncated.

    Leave a comment:


  • Julien
    replied
    Re: Bitrate of the Dolby Digital?

    Originally posted by Hagen View Post

    ....The bitrate is not 150kbit or less. You would really hear that considering it's a 5.1 sound track.

    But you bring up a good point. May be for material like shine a light, where audio could be considered more important then video, we should spend more bits on the audio and take a slight hit on the video quality....
    Actually 150Kbps may be a little high because even though it is 5.1 Dolby uses bit pooling so you have more "efficiency/redundancy" with muli-channels. XM/Sirius use VBR with over all channel (station) bit pooling, but on average it is about 50Kbps or less per channel (station).

    I agree that you should probably up the audio bit rate (especially on music related titles) since it costs so little bits in the video department.

    Unfortunately most people are so used to "hot" lossy music and relegating sounds way below vision in information importance so that audio takes a back seat to video.

    Leave a comment:


  • Julien
    replied
    Re: Bitrate of the Dolby Digital?

    Originally posted by redwein View Post
    Aren't the songs on "Shine A Light" from live material? If so, isn't the SQ of live recordings always significantly worse than studio recordings, even though they doctor it up in the studio? I'd try to watch a movie that wasn't music based for comparison.
    Correct in most cases (Eagles-Hell Freezes Over as an example of "studio" quality live venue). However I was only address perceptual coding artifacts and not the quality of the original content.

    Leave a comment:


  • Hagen
    replied
    Re: Bitrate of the Dolby Digital?

    I listened a little bit to the first part of it and it doesn't sound too bad to me. But I also have to admit that I didn't get proper listening training. ...and I'm also usually quite happy with XM (given that I only listen to it in the car).

    I'll test some more later once the movie is fully downloaded.

    The bitrate is not 150kbit or less. You would really hear that considering it's a 5.1 sound track.

    But you bring up a good point. May be for material like shine a light, where audio could be considered more important then video, we should spend more bits on the audio and take a slight hit on the video quality.

    I'll talk with our content guys about that.

    Hagen.

    Leave a comment:


  • redwein
    replied
    Re: Bitrate of the Dolby Digital?

    Aren't the songs on "Shine A Light" from live material? If so, isn't the SQ of live recordings always significantly worse than studio recordings, even though they doctor it up in the studio? I'd try to watch a movie that wasn't music based for comparison.

    Leave a comment:

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