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מה זה 4:2:2?
האם זו שיטת הצפנה כלשהי?
האם זו שיטת הצפנה כלשהי?
אתה משתמש בדפדפן מיושן. יתכן והאתר הנוכחי יוצג באופן שגוי, כמו כן אתרים אחרים ברשת.
אנא שדרג את הדפדפן או השתמש בדפדפן חילופי.
אנא שדרג את הדפדפן או השתמש בדפדפן חילופי.
מה זה 4:2:2?
- פותח הנושא עופריקו 1 האחד
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אז הנה הבר יות רחב: --------------------- is a video chroma format used by broadcasters for the best quality picture. Normal transmissions are in 4:2:0. To view the 4:2:2 transmissions normally you would need a professional receiver costing thousands of pounds but with the advent of PCI cards like the Skystar 2 it is now possible to view these feeds for less than 100Euro. All you need is a Skystar 2 PCI card for your pc , a dish connected to the card and pointed to the correct satellite and the software Progdvb.exe which is available free from www.progdvb.com. It is also possible to view 4:2:2 using a Nokia 9xxx series receiver connected to a pc via a scsi cable and running the software program DVBRecorder Here Is a technical explanationof 4:2:2 - "In the digital world video signals are encoded when recorded and decoded on playback. Depending on the digital format the video signal will be sampled at either 4:1:1 or 4:2:2 sampling. The digital video signal has three components, they are the luminance (Y), a color value consisting of the luminance deducted from the color red (R-Y) and the color value of the luminance deducted from the color blue (B-Y). This is the same components that make up a Betacam SP and Digital Betacam signal. These three components, Y, R-Y and B-Y are also know as “YUV”. During the digitizing process, the three parameters of the component video signal are assigned a numeric sampling value. Groups of four video pixels within each of the three components are looked at and samples are taken for recording. With a 4:2:2 sampled video signal, all four of the luminance pixels are sampled, two of the R-Y pixels are sampled and two B-Y pixels are sampled. This gives you a 4:2:2 sampling rate. With a 4:1:1 signal, all four of the luminance pixels are sampled signal is sampled four times out of four, but only one pixel is sampled from each of the R-Y and B-Y. This lower sampling rate of the color components will result in less color information being recorded. This lower sampling rate affects the accuracy and intensity of the color in the video signal. Therefore, you may not want to use 4:1:1 when doing Chroma keying, graphics, and other compositing functions, since all of these require strong colors to be present in the video signal.. The advantage of 4:1:1 sampling is that you can record twice as much information onto the same area of video tape, thus providing twice as much recording/playback time within a given tape length. And, of course, the circuitry within the equipment is less expensive for a manufacturer to produce"
אז הנה הבר יות רחב: --------------------- is a video chroma format used by broadcasters for the best quality picture. Normal transmissions are in 4:2:0. To view the 4:2:2 transmissions normally you would need a professional receiver costing thousands of pounds but with the advent of PCI cards like the Skystar 2 it is now possible to view these feeds for less than 100Euro. All you need is a Skystar 2 PCI card for your pc , a dish connected to the card and pointed to the correct satellite and the software Progdvb.exe which is available free from www.progdvb.com. It is also possible to view 4:2:2 using a Nokia 9xxx series receiver connected to a pc via a scsi cable and running the software program DVBRecorder Here Is a technical explanationof 4:2:2 - "In the digital world video signals are encoded when recorded and decoded on playback. Depending on the digital format the video signal will be sampled at either 4:1:1 or 4:2:2 sampling. The digital video signal has three components, they are the luminance (Y), a color value consisting of the luminance deducted from the color red (R-Y) and the color value of the luminance deducted from the color blue (B-Y). This is the same components that make up a Betacam SP and Digital Betacam signal. These three components, Y, R-Y and B-Y are also know as “YUV”. During the digitizing process, the three parameters of the component video signal are assigned a numeric sampling value. Groups of four video pixels within each of the three components are looked at and samples are taken for recording. With a 4:2:2 sampled video signal, all four of the luminance pixels are sampled, two of the R-Y pixels are sampled and two B-Y pixels are sampled. This gives you a 4:2:2 sampling rate. With a 4:1:1 signal, all four of the luminance pixels are sampled signal is sampled four times out of four, but only one pixel is sampled from each of the R-Y and B-Y. This lower sampling rate of the color components will result in less color information being recorded. This lower sampling rate affects the accuracy and intensity of the color in the video signal. Therefore, you may not want to use 4:1:1 when doing Chroma keying, graphics, and other compositing functions, since all of these require strong colors to be present in the video signal.. The advantage of 4:1:1 sampling is that you can record twice as much information onto the same area of video tape, thus providing twice as much recording/playback time within a given tape length. And, of course, the circuitry within the equipment is less expensive for a manufacturer to produce"
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אז אם ככה
לא תהיה לי אפשרות לקלוט שידורים שמועברים בצורה כזו במידה ויש לי מקלט לווינים רגיל? (אקוסטאר 3000IP)
לא תהיה לי אפשרות לקלוט שידורים שמועברים בצורה כזו במידה ויש לי מקלט לווינים רגיל? (אקוסטאר 3000IP)
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תודה!
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