Blu-ray Codecs

With the debut of all kinds of Blu-ray players, Blu-ray is getting closer and closer to us now. Blu-ray is not just a simple optical disk. It is the one which integrated a number of high technology. The Blu-ray movies are not composited in only one video codec but formed by a variety of Blu-ray video codecs. Today we will lead you to have a look on all the Blu-ray codecs for the video coding.

Coding is a compression way which can make more efficiently audio and video data storage. It is a method that can effectively reduce the use of space or optimize the quality of per-megabyte. If the Blu-ray Disc is likened to a large drawer and the audio and video data are liken to large amount of files, then the encoding is equivalent to way to store the files in an orderly and efficient arrangement.

Blu-ray Codecs - Blu-ray Disc Coding Specifications

blu-ray disc coding specifications The main task of BD-ROM standardization is to provide a Blu-ray coding technology that can be both compatible with the hardware decoder (that means the players) and production software for films (which refers to the content). For this reason, the new measure just come out that all players must support MPEG-2, H.264/MPEG-4 AVC and SMPTE VC-1 formats Blu-ray videos. That also means the videos stored in BD-ROM must be in one of the three codecs. And it is not allowed to use several codecs in one light disk.

Blu-ray Codecs - H.264/MPEG-4 AVC

Studies show that if make comparison on the resolution performance and used bandwidth between MPEG-4 AVC(H.264) and MPEG-2, both of them can be up to 1920 × 1080i (non-interlaced) HD resolution and 24fps (frame per second update 24) of the DVD image quality. But the bandwidth required on the MPEG-2 is 12 ~ 20Mbps and MPEG-4 AVC is 7 ~ 8Mbps. More directly, if the bandwidth of MPEG-2 as a benchmark 100%, then the MPEG-4 AVC is as low as 40% which only about the original MPEG -2 1 / 2 ~ 1 / 3.

Blu-ray Codecs - VC-1

Of course, Microsoft did not want to hand over on the Blu-ray video codec. So it introduced VC-1 to compete with H.264. VC-1 has the potential to quickly narrow the gap that compare with MP4G-4 AVC. It established based on the WM9 VC-1 compression system. The specification VC-1 differences in less aspect than MPEG-4, in which there are many differences of interpretation. Another powerful and important factor for VC-1 is that in many telecommunications companies (including SBC) has announced support for Microsoft's IPTV platform.

Although H.264 can be deployed on Microsoft's IPTV platform, but the telecommunications company who had used Microsoft's IPTV has a strong preference to achieve full integration of Microsoft solutions.

Blu-ray Codecs - MPEG-2

MPEG-2 is a video format which has been used in DVD. For its maturity and stability, MPEG-2 is continuing being used in the Blu-ray era. It is the compression schemes and detailed provisions for system level which works on digital television and HD television under a variety of applications.

Because of the different in the compression efficiency, the choice of codec technology has greatly affected the manufacturer's authorization and patent royalties, and even the longest time for a video file. The HD video encoded in MPEG-2 is usually recorded in the single-layer BD-ROM (25GB) disc and limited to about two hours for playing. And the more advanced video codec technology VC-1 and MPEG-4 AVC usually can reach the video quality twice than that using the MPEG-2.

No doubt what Blu-ray video codes your Blu-ray in, you can get your Blu-ray disc ripped by using AVCWare Blu Ray Ripper. It can help you rip your Blu-ray movies to your portable devices supported video formats effortlessly.

You may be interested in: How to Play Blu-ray on PC, How to Read Blu-ray Disc, Blu-ray Copy Protection

Keys: Blu-ray Disc Coding Specifications, Blu-ray Video Codecs, Blu-ray Coding