YouTube has improved image quality within 3 months, and existing movies also have high image quality

Although it is the largest in the video sharing site, although YouTube is somewhat pressed on the video sharing site afterwards, it seems to be a little YouTube, but it will improve image quality within 3 months. Moreover, as for the existing movie, it saves all the original movie at the time of uploading actually, and it seems to produce high quality version using it.

Details are as below.
High-quality YouTube videos coming soon | Tech news blog - CNET News.com

High quality YouTube video, soon available for viewing: News - CNET Japan

As a mechanism, it detects the user's connection speed, and when it is high speed, it shows a version with improved image quality ... ....

Although details such as how much the image quality improves or resolution is unknown, it is already unknown in the next Flash Player 9 that a new video codec "H.264" will be adopted, which is quite high The image quality and the file size are small, so it seems to be influential. It is already visible in August this year.

Flash Player 9 supports "H.264" - YouTube also HDized? | PC | My Computer Journal

Flash Player latest version is H.264 support, YouTube also high definition? - IT

What is H.264 is gathered in Wikipedia.

H.264 - Wikipedia
http://ja.wikipedia.org/wiki/H.264

H.264 is said to realize compression efficiency more than twice that of the conventional method such as MPEG-2, and it is widely used from low bit rate for mobile phone use and high bit rate of HDTV class It is supposed to be done.

That is, the compression rate is higher than the MPEG-2 format used for DVDs. It has already been adopted in One Seg broadcasting and QuickTime 7, and this will be available from the next Flash.

How much difference there is, the distribution of HD MPEG-2 contents (1920 × 1080) is 12 to 20 Mbps. On the other hand, H.264 can deliver the same 1920 × 1080 contents at 7 to 8 Mbps. Moreover, the image quality is equal or higher. In other words, H.264 will have image quality of DVD quality at about half the data rate of MPEG-2. Apple's site is detailed about this.

Apple - QuickTime - H.264 - Frequently Asked Questions

Apple - QuickTime - Technology - H.264