sahaelectronic.com http://www.sahaelectronic.com The Power of H.264 /saha-electronic/english/details/cctv/article.11.96.1.html Sat, 23 Feb 2008 11:53:37 +0330

GVC Technologies utilizes the most advanced video compression technology known as H.264. Previewing and recording of video and audio are in real-time and fully synchronized in both modes. Video feeds are directly transmitted from the video capture card to the display frame buffer and the compressed stream data is directly sent to the host's memory. The transmission process doesn't need any intervention from the host computer's CPU, greatly saving resources of the host computer's processor. Therefore, user will experience better video performance.




 Benefits 1 - Efficiency
 2x more efficient than MPEG-4 Part 2 (natural video) encoding		 Benefits 2 - File Size
 3x smaller file size than comparable MPEG-2 encoders
   
 Benefits 3 - Download Time
 Faster download time 		 Benefits 4 - Image Quality
 Substantially higher quality video (SNR)  
   
Benefits 5 - No Motion Blurring
 No fast motion blurring inherent in MPEG-4 (advanced motion compensation)		 Benefits 6 - Capability
 Anticipates error-prone transport over mobile networks
   

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]]> MPEG4 vs H.264 /saha-electronic/english/details/cctv/article.12.96.1.html Sat, 23 Feb 2008 11:53:56 +0330
H.264 offers dramatically lower bit rates and better picture quality than MPEG-2, MPEG-4, H.263+ etc.


 ]]> Standards Differences /saha-electronic/english/details/cctv/article.13.96.1.html Sat, 23 Feb 2008 11:54:19 +0330
The following table compares H.264 with both MPEG-2 and MPEG-4 feature sets.


 ]]> H.264 Encoding Evolution /saha-electronic/english/details/cctv/article.14.96.1.html Sat, 23 Feb 2008 11:54:49 +0330
 
]]> Encoding Standards Applications /saha-electronic/english/details/cctv/article.15.96.1.html Sat, 23 Feb 2008 11:55:15 +0330
Comments
Quality / Bit rates
Codec
Nearly every computer supports MPEG-1 files.
Typically used for lower resolution video, but can be used for any resolution. Progressive only.                             1
VHS quality at 1.5Mbps.
Typical resolution CIF.            1
MPEG -1
International Standard
(1992)            1
Application: Digital TV, HDTV, DVD, digital cable, satellite and terrestrial broadcast.  1
High quality, typically full D1 resolution (MPEG-2 is used for Broadcasting and DVD) at 6-8 Mbps.              1
MPEG-2
International Standard
(1994)             1
Application: Digital television; Interactive graphics applications (synthetic content);
Interactive multimedia (World Wide Web, distribution of and access to content).  1
DVD quality at 4 Mbps.
VCR quality at 2 Mbps
Provides 1.5 times better compression as compared to MPEG-2 standard, given the similar video quality level.1
MPEG-4
Part 2 Visual
H.263
(1998)             1
The most advanced standard with fidelity extension ranges approved in April 2004 as the new High Definition TV Standard. New extensions allow for advanced broadcasting and video editing. Open standard adopted by all major industry participants (Intel, Microsoft, Apple, Cisco, Motorola, IBM...)            1
DVD quality at 2-3 Mbps.
VCR quality at 1-1.5 Mbps
Provides 2.5-4 times better compression as compared to MPEG-2 standard, given the similar video quality level .1
MPEG-4
Part 10/AVC
H.264
(2003)             1

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