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PANASONIC's AVC-Intra Is Not The Same As AVCHD
The AVCHD specification allows for a maximum bit rate of 24Mbps, which is very close to the HDV max bit rate of 25Mbps.
AVC-Intra's bit rate can be even higher.
But AVC-Intra is entirely different from AVCHD.
Here's the text of PANASONIC's information about "AVC-Intra."
__________
Panasonic Press Release.
Amsterdam 2006.
P2 HD AVC-I. A New Compression
Panasonic is proud to announce AVC-Intra as an addition to its already highly efficient DVCPRO HD compression scheme, reinforcing the quality and stability of Intra frame recording. Developed to give greater flexibility in Broadcast HD production, the new intra frame compression format will give broadcasters and production companies a greater choice without necessarily compromising HD quality.
The new higher efficiency, open standard compression scheme is based on H.264, a new technology. This gives a huge increase in Pixels by Line at 100Mbps and the similar amount as DVCPRO HD at 50Mbps, effectively creating a new level of HD production while lowering production costs. For a comparison of Pixel by line chart please see the appendix attached below.
This means approximately 2 x higher efficiency than any HD compression scheme currently available. Switchable between high quality 100Mbps mode for high end production and a more cost effective 50Mbps mode for situations where HD quality is required but faster and at a lower cost.
Ideal for broadcasters it offers stable picture quality whichever subject and situation faced with no quality damage during frame by frame editing. The 100Mbps mode will be compliant with HD studio standard in I-frame only and new in acquisition, it offers full sample support with no prefilter required.
AVC-I however, is not to become a stand alone compression scheme making equipment choice another factor in choosing acquisition formats as it is with other manufactures. It is to exist alongside DVCPRO HD creating a range of equipment not only Global in application but able to give even greater choice within each piece of equipment, not uncertainty.
This is only possible because of the efficiency of the P2 system utilising a truly adaptable IT infrastructure as a basis to open the door to including new formats.
AVC-Intra in a 4:2:2 studio profile, 100Mbps provides in the luminance channel Y: 1920 * 1080i and chrominance channel C: 960 * 1080i. Respectively in the 720 format it achieves Y: 1280*720p and C: 640*720p.
AVC-Intra in cost effective 50Mbps provides, in the Luminance channel Y: 1440 pix/line and in the chrominance channel C: 720 pix/line.
In comparison DVCPRO HD 4:2:2 sampling provides in the Luminance channel Y: 1440 pix/line and in the chrominance channel C: 720 pix/line.
New products that will include this new compression scheme are the shoulder mounted Camcorder, the AJ-HPX2100, the new P2 mobile (AJ-HPM100). First available products will be available in July 2007.
For more information on AVC-I please contact Michael Erkelenz at Michael.erkelenz@eu.panasonic.com or Stefan Hoffman at stefan.hoffman@eu.panasonic.com or visit our website at www.panasonic-broadcast.com.
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SOURCE: http://tinyurl.com/yjta9s
The only similarity between AVCHD and AVC-Intra is that they are both H.264-compliant.
Jerry Jones
AVC-Intra's bit rate can be even higher.
But AVC-Intra is entirely different from AVCHD.
Here's the text of PANASONIC's information about "AVC-Intra."
__________
Panasonic Press Release.
Amsterdam 2006.
P2 HD AVC-I. A New Compression
Panasonic is proud to announce AVC-Intra as an addition to its already highly efficient DVCPRO HD compression scheme, reinforcing the quality and stability of Intra frame recording. Developed to give greater flexibility in Broadcast HD production, the new intra frame compression format will give broadcasters and production companies a greater choice without necessarily compromising HD quality.
The new higher efficiency, open standard compression scheme is based on H.264, a new technology. This gives a huge increase in Pixels by Line at 100Mbps and the similar amount as DVCPRO HD at 50Mbps, effectively creating a new level of HD production while lowering production costs. For a comparison of Pixel by line chart please see the appendix attached below.
This means approximately 2 x higher efficiency than any HD compression scheme currently available. Switchable between high quality 100Mbps mode for high end production and a more cost effective 50Mbps mode for situations where HD quality is required but faster and at a lower cost.
Ideal for broadcasters it offers stable picture quality whichever subject and situation faced with no quality damage during frame by frame editing. The 100Mbps mode will be compliant with HD studio standard in I-frame only and new in acquisition, it offers full sample support with no prefilter required.
AVC-I however, is not to become a stand alone compression scheme making equipment choice another factor in choosing acquisition formats as it is with other manufactures. It is to exist alongside DVCPRO HD creating a range of equipment not only Global in application but able to give even greater choice within each piece of equipment, not uncertainty.
This is only possible because of the efficiency of the P2 system utilising a truly adaptable IT infrastructure as a basis to open the door to including new formats.
AVC-Intra in a 4:2:2 studio profile, 100Mbps provides in the luminance channel Y: 1920 * 1080i and chrominance channel C: 960 * 1080i. Respectively in the 720 format it achieves Y: 1280*720p and C: 640*720p.
AVC-Intra in cost effective 50Mbps provides, in the Luminance channel Y: 1440 pix/line and in the chrominance channel C: 720 pix/line.
In comparison DVCPRO HD 4:2:2 sampling provides in the Luminance channel Y: 1440 pix/line and in the chrominance channel C: 720 pix/line.
New products that will include this new compression scheme are the shoulder mounted Camcorder, the AJ-HPX2100, the new P2 mobile (AJ-HPM100). First available products will be available in July 2007.
For more information on AVC-I please contact Michael Erkelenz at Michael.erkelenz@eu.panasonic.com or Stefan Hoffman at stefan.hoffman@eu.panasonic.com or visit our website at www.panasonic-broadcast.com.
_______________
SOURCE: http://tinyurl.com/yjta9s
The only similarity between AVCHD and AVC-Intra is that they are both H.264-compliant.
Jerry Jones
