Can you figure this out?? WARNING!! u need to be a genius?

Thursday, May 13th, 2010 at 9:33 am  
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The Big Brother TV production team have contacted you to analyse whether their show could be broadcast using UHSatellite which is limited at 6,000,000 bits per second per TV channel. Big Brother cameramen now use HD digital cameras and only one is broadcast at a time. High Definition is used to have a closer look at the action. The resolution for each frame consists of Y = 1440 ´ 1080, Cb = Cr = 720 ´ 540, each pixel is quantised using 8 bits and the frame rate is 25 frames per second.

1.1 Given the resolution above, what is the size of a full uncompressed frame (in bits)?

1.2 The digital video signal is then MPEG encoded. You are told that the group of pictures (GOP) span N=12 and the prediction span M=4. With this information, use a diagram to show the frame sequence. Describe the frame types that are found in MPEG encoding.

1.3 Taking this into account, how many GOPs are streamed on average in 1 second?

The production team has given you the following table stating the average compression for each frame:

I-frame 10:1
P-frame 20:1
B-frame 60:1

1.4 Using this information, what is the size of a GOP (in bits)?

1.5 Knowing the size of the GOP, calculate the bit rate that will be generated by the encoder.

1.6 Finally, from the results above, comment on whether you would recommend UHSatellite to broadcast Big Brother.


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CAN YOU FIGURE THIS OUT?????????? WARNING!!! YoU MUST BE A GENIUS!!!!!!!?

Wednesday, May 12th, 2010 at 9:20 am  
Comments (2)

The Big Brother TV production team have contacted you to analyse whether their show could be broadcast using UHSatellite which is limited at 6,000,000 bits per second per TV channel. Big Brother cameramen now use HD digital cameras and only one is broadcast at a time. High Definition is used to have a closer look at the action. The resolution for each frame consists of Y = 1440 ´ 1080, Cb = Cr = 720 ´ 540, each pixel is quantised using 8 bits and the frame rate is 25 frames per second.

1.1 Given the resolution above, what is the size of a full uncompressed frame (in bits)?

1.2 The digital video signal is then MPEG encoded. You are told that the group of pictures (GOP) span N=12 and the prediction span M=4. With this information, use a diagram to show the frame sequence. Describe the frame types that are found in MPEG encoding.

1.3 Taking this into account, how many GOPs are streamed on average in 1 second?

The production team has given you the following table stating the average compression for each frame:

I-frame 10:1
P-frame 20:1
B-frame 60:1

1.4 Using this information, what is the size of a GOP (in bits)?

1.5 Knowing the size of the GOP, calculate the bit rate that will be generated by the encoder.

1.6 Finally, from the results above, comment on whether you would recommend UHSatellite to broadcast Big Brother.


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Digital photo frame compatible with most modern day digital cameras?

Friday, April 30th, 2010 at 11:43 pm  
Comments (1)

Well my girlfriend is getting a digital camera for Christmas from her mum and i was going to get her a digital photo frame to put pics of us in it so they get set on a slide show…but i don’t know whether the camera her mum is buying her is compatible with digital photo frames!

So are most modern digital cameras compatible with digital frames?


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DXG 552C 5.1MP Digital Camera? Look at this and tell me if you think this is a good camera to buy?

Friday, April 23rd, 2010 at 9:27 am  
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I don’t know anything about digital cameras tell me if you think this one is good.

Video, still photo and webcam, all in one.
Capture photos, movies and more using the DXG-552 5.1MP Digital Camera. Take detailed digital photos using the 5.1-megapixel CMOS sensor and 4x digital zoom lens. Movie Mode allows you to capture AVI video with sound in 640×480 resolution at 30 frames per second. Connect to your computer via the USB port to transfer photos and videos or use as a webcam for streaming Internet video. This lightweight, compact camera has 32MB of internal storage and supports SD Memory Cards up to 1GB.

5.1-megapixel CMOS sensor captures high-resolution images up to 3680×2760 for enhanced detail
4x digital zoom allows you to capture high-quality closeup shots from a distance
8.25mm fixed-focus f/3.0-8.0 lens delivers exceptional image quality for your photos and movies
2" LTPS LCD makes it easy to frame and view your shots


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