Quote:
Originally Posted by Ignitionnet
The comparisons I linked were notable in mentioning the difference in audio quality.
Fingers crossed that, at some point fairly soon, enhanced lossy codecs and lower bit rates aren't needed to compensate for sub-standard networks.
|
Indeed, that's what reminded me of it in the first place. The LOTR trilogy is faily old by now, but does still use DTS-HD Master audio, although only in 6.1 format. Regardless, up to 25Mbit/s peaks are allowed, even if the average is much lower.
That, in fact, leads me to one of the fundamental differences between streaming and optical media - the latter allows for much higher variability in data rate, whereas streaming is more akin to the CBR (constant bit-rate) encoding that was used in the very early days that has been long since abandoned, because, well, it sucked.
Unfortunately for decent VBR steams to work we either need much faster (peak) internet connections or bigger buffers... And nobody likes buffering.
---------- Post added at 11:46 ---------- Previous post was at 11:43 ----------
Quote:
Originally Posted by Kushan
Yeah, I wasn't trying to dispute the streaming vs Blu-ray argument at all, I was genuinely curious to see how things like streamed h.265 stacks up against say an MPEG-2 blu-ray. It's one thing to mention bit rates but if the CODEC is naff, then it's not the full picture.
|
Well, H.265 streaming is just as rare as MPEG-2 Blu-Ray, as in both are the exception to the norm. Most streaming uses H.264 class codecs as do most Blu-rays. It's only very old Blu-rays and very new streamers that do different, so comparing a 2016 codec to a 2006 codec isn't exactly representative
Speaking of, H.265, 4K, wide-gamut and deep-colour have all been incorporated into the Blu-ray UHD standard now, so streaming is going to have even more competition.
---------- Post added at 11:56 ---------- Previous post was at 11:46 ----------
Quote:
Originally Posted by Ignitionnet
In the case of the Lord of the Rings trilogy the following bit rates were used for the extended edition Blu Rays:
LOTR: Fellowship of the Ring
Average video: 29.84Mbps
Average audio: 4.717Mbps
LOTR: The Two Towers
Average video: 29.9Mbps
Average audio: 4.427Mbps
LOTR: The Return of the King
Average video: 30.23Mbps
Average audio: 4.474Mbps
|
Actually, now that you mention it, that's missing out one very important metric: bits per pixel. Those movies frames are 1920x800x24p equating to 36.9 million pixels per second, represented by around 30 million bits per second of data.
HDTV broadcasts and/or streams are typically 1920x1080x30p or 60p equating to at least 62.2 million pixels per second, or in other words, that's at a minimum already 70%
more data that has to be compressed into one third the bitrate.
Speaking of, Sony's 'Mastered in 4K' blurays are 1080p media with an enhanced average bitrate of 35Mbps to 38Mbps supposedly.
Join CF
You are here: 
