On Sun, 18 Mar 2012 01:58:05 GMT, in 'rec.video',
in article <Re: MPEG2/4 and Sony>,
>Roman Rumian <rumianusu...
>> Dear Friends,
>> what is the contribution of Sony to MPEG2 or MPEG4 video standard ?
>> How do this company participate in the benefits of these standards ?
>> Could you give me a short answer ?
>> Thank you.
>> Roman Rumian
>Sony has its own standard which is AVCHD
Sorry to be my usual pedantic self, but for the benefit of the OP,
AVCHD is not a "Sony standard". AVCHD was devised by Panasonic who
invited Sony to join them in announcing the new format, which they
did, and that's why the original AVCHD announcement was a joint
Of course, AVCHD has since become the de facto standard on consumer
grade camcorders, and other low-end video devices, and any
manufacturer that's willing to pay the licensing fees (to MPEG LA) is
welcome to implement it in their products, and indeed many do.
But it is by no means a "Sony standard", or even a "Panasonic
>and is used on Blu-ray movie discs and video cameras.
AVCHD is *not* used on "Blu-ray movie discs".
"Blu-ray movie discs" can use MPEG-2, MPEG-4 Part 10 AVC / H.264, or
VC-1 video encoding. It's just by coincidence that the AVCHD camcorder
video format happens to also use MPEG-4 Part 10 AVC / H.264 video
MPEG-2 and MPEG-4, including both MPEG-4 Part 2 and MPEG-4 Part 10,
are ISO/IEC International Standards.
VC-1, devised by Microsoft and based upon WMV 9, is a SMPTE standard.
MPEG-4 Part 10 is also an ITU-T standard (H.264).
As to the OP's question, if I were being paid to write a full report,
I would do so, but since I'm not, I'll just say, look up the Sony
HDCAM SR video format. It's a 10-bit format based upon the Studio
Profile of the MPEG-4 Part 2 International Standard and runs at either
440 Mbps or 880 Mbps and is normally recorded to magnetic tape.
The 880 Mbps recording mode supports 4:4:4 RGB video with 12 channels
of 24-bit 48 kHz non-compressed LPCM audio. It's the highest density
video tape recording format ever to have been developed, or ever to be
Sony has benefited greatly from this as the HDCAM SR format is the
most commonly used tape-based format for high definition program
interchange - and this is true not just in North America, but
worldwide - but do note that various forms of file-based interchange
are replacing HDCAM SR tape as the major interchange format. There are
multiple reasons for this, not the least of which was the recent
severe shortage of HDCAM SR tape caused by the tsunami in Japan.
Here are three references (of many) on the subject.
HDCAM SR used to be Sony's highest quality video format, but that
honor currently goes to their recently-introduced SRMaster format,
which is intended as a motion picture film camera substitute and not
as a regular television video format. The SRMaster format is not
recorded to tape, but instead to high speed flash memory cards.
Frank, Independent Consultant, New York, NY
[Please remove 'nojunkmail.' from address to reply via e-mail.]
Read Frank's thoughts on HDV at http://www.humanvalues.net/hdv/
[also covers AVCHD (including AVCCAM & NXCAM) and XDCAM EX].