Jannyferr
Member
Now many people watch Blu-ray and 4K as soon as they see a movie. They look for these blu-ray movie resources from all places. Why do these people have to watch the movie resources with this resolution? Let me talk about why this is to satisfy your curiosity about normal movie and blu-ray movie.
If you use a computer to watch Blu-ray movies, it may not be obvious, because even a 24 inch display can at least display completely. If you only watch on a 20 inch display screen, you can't directly observe the subtle difference between the two with the naked eye, provided that both are 1080p (resolution is 1920 × 1080). However, the resolution of display screen below 24 inches is generally lower than 1920 × 1080. For example, the display with a resolution of 1440 × 900 can play 1080p high-definition movies. Although it can be full screen, it will compress and reduce the image quality. The loss of detail can be said to be quite serious.
If you watch a 45gb Blu-ray original film and a 10GB high-definition film on a large screen of more than 45 inches, there will be a significant gap between the two. You can see the details of the two, such as the face and clothing of the characters. If you use a larger screen or a larger display device in your home, the effect gap will be very obvious. It's also very important that HD movies not only reflect a single aspect, but also audio is a link, including sound quality, channel support number and track.
Why is Blu-ray original disk good?
Usually, after a movie is released, it will launch peripheral products, the most important of which is Movie DVD. The main difference between different types of DVDs is that the maximum data capacity of a single disc is different. Ordinary DVD-5 single disc can only hold 4.7 g, DVD-9 bit 8.5g, while the blu-ray disc single disc can hold at least 25g of data. Multi-layer blu-ray technology, single sheet capacity up to 128G.
The capacity comparison may not be very intuitive. We can take a 120 minute standard movie as an example to compare the impact of different formats on movie quality.
DVD-5 copy, film size is 4.7G, barely reaching the level of 720p, film resolution is 1280x720, but the compression ratio is small, only 2-3mbps, that is to say, the quality of sound and image is very low.
DVD-9 copy, the film size increased to 8.7g, can reach the standard 720p film size, such film compression ratio is higher than 4Mbps, sound and image almost no loss.
In fact, both of the above are lossy DVD compression formats, while blu-ray discs are really lossless formats.
Most Blu-ray films are about 40-70g, with a resolution of 1920x1080, and a code rate of tens of Mbps. There is no loss in image or audio, which is the real 1080p.
But the ordinary DVD player can't play the Blu-ray disc. You must use a special Blu-ray player to play the Blu-ray disc. At the same time, the copyright of the blu-ray disc is also protected. It can't be played on players with different area codes. That is to say, if you buy a blu-ray disc in the United States, it can't be played with players in China.
Blu-ray disc is also rich in content, including special navigation menu, review track, behind the scenes gags, production interviews and so on.
What are the disadvantages of Blu-ray films?
The price is higher, of course. In addition, if you buy a lot of blu-ray discs, you need to consider the storage space at home. Now many people will buy Intelligent blu-ray players or download movie resources directly from the Internet. So it depends on your personal needs. All in all, blu-ray movies do look good.
If you use a computer to watch Blu-ray movies, it may not be obvious, because even a 24 inch display can at least display completely. If you only watch on a 20 inch display screen, you can't directly observe the subtle difference between the two with the naked eye, provided that both are 1080p (resolution is 1920 × 1080). However, the resolution of display screen below 24 inches is generally lower than 1920 × 1080. For example, the display with a resolution of 1440 × 900 can play 1080p high-definition movies. Although it can be full screen, it will compress and reduce the image quality. The loss of detail can be said to be quite serious.
If you watch a 45gb Blu-ray original film and a 10GB high-definition film on a large screen of more than 45 inches, there will be a significant gap between the two. You can see the details of the two, such as the face and clothing of the characters. If you use a larger screen or a larger display device in your home, the effect gap will be very obvious. It's also very important that HD movies not only reflect a single aspect, but also audio is a link, including sound quality, channel support number and track.
Why is Blu-ray original disk good?
Usually, after a movie is released, it will launch peripheral products, the most important of which is Movie DVD. The main difference between different types of DVDs is that the maximum data capacity of a single disc is different. Ordinary DVD-5 single disc can only hold 4.7 g, DVD-9 bit 8.5g, while the blu-ray disc single disc can hold at least 25g of data. Multi-layer blu-ray technology, single sheet capacity up to 128G.
The capacity comparison may not be very intuitive. We can take a 120 minute standard movie as an example to compare the impact of different formats on movie quality.
DVD-5 copy, film size is 4.7G, barely reaching the level of 720p, film resolution is 1280x720, but the compression ratio is small, only 2-3mbps, that is to say, the quality of sound and image is very low.
DVD-9 copy, the film size increased to 8.7g, can reach the standard 720p film size, such film compression ratio is higher than 4Mbps, sound and image almost no loss.
In fact, both of the above are lossy DVD compression formats, while blu-ray discs are really lossless formats.
Most Blu-ray films are about 40-70g, with a resolution of 1920x1080, and a code rate of tens of Mbps. There is no loss in image or audio, which is the real 1080p.
But the ordinary DVD player can't play the Blu-ray disc. You must use a special Blu-ray player to play the Blu-ray disc. At the same time, the copyright of the blu-ray disc is also protected. It can't be played on players with different area codes. That is to say, if you buy a blu-ray disc in the United States, it can't be played with players in China.
Blu-ray disc is also rich in content, including special navigation menu, review track, behind the scenes gags, production interviews and so on.
What are the disadvantages of Blu-ray films?
The price is higher, of course. In addition, if you buy a lot of blu-ray discs, you need to consider the storage space at home. Now many people will buy Intelligent blu-ray players or download movie resources directly from the Internet. So it depends on your personal needs. All in all, blu-ray movies do look good.
