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The color space is three-dimensional by the human aspect, so after reducing the illumination powered by base signal, the color sub-carrier still needs to carry a two-dimensional signal. Typically red (R) and blue (B) data are conveyed because their signal difference (RY and BY) is stronger than Green (GY) with Lynnmons.

Sikam is different from other color systems through the SEO and by signals.

First, using the frequency modulation to encode the information of the sequam sub-carrier chrominas.

Secondly, instead of combining red and blue data, it only sends one by one and uses information about the other colors from the previous line. It uses an analog delay line, a memory device, to save one line of color information. It supports the name "with serials, memories".

Because Sikam only sends one color at a time, it is free from both synthesis of NTSC and PAL, which is the result of the joint transmission of both the signals.

This means vertical color resolutions are related to NTSC. The next pell system displays half vertical resolution of NTSC (i.e., same as SICAM). Although PAL does not exclude vertical color information during encoding, but it combines the color related to the adjacent lines at the decoding level, so that the time for measuring "black sub carrier phase error" is the measurement / phase-modulated color submachine infection. Carrier It is usually used to use a delay-like delay line (as a result of Paul De or Pol delay lines, sometimes referred to as deluxe), but cheap TV sets can be done "apparently" using the PAL-S (PAL-Easy) decoder. Because the sequam color sub-carrier's FM modulation phase (or amplitude) is inconsistent for errors, phase errors do not reduce the saturation of the color, although they are in PAL. In NTSC, such flaws are due to color change (hence the "Hugh" control in all NTSC TV sets to adjust the color phase with constant bias).

Color difference differences in Sikam are actually calculated on the YDbDr color space, which is YUV color space-sized version. This encoding is only suitable for one signal transmission at a time.

Color information FM modulation allows Scam to completely free dot crawl problems with other algorithms. CCHM transmissions are more powerful than NTSC or PAL. However, due to the nature of their FM, color sign is present, even though the dimensions of the film are also in width, even though it does not have a PAL type color crawl, it is subject to cross-cross color.

Although most pattern pattern and NTSC-encoded signals are designed to modernize with a combo filter (it is designed to separate the two signals, where Luma can overlap the spectrum used by spectrum chrome), but some parts may still have some parts of the picture. These parts include sudden edges in the picture, sudden color changes with the photo, or some repetition patterns such as a checker board in clothing. Dot crawl patterns can be completely removed completely by connecting to the signal source via a combination of a composite video (yellow RCA cable) or convex cable, such as S-Video, via a wire or signal format, which carries a signal in a separate band, Leaves the band to use, which usually requires empty parts. FM Sikam is a continuous spectrum, so unlike Pal and NTSC even a perfect digital blanket filter can not completely separate SECAM color and luminance.

The idea of ​​reducing the vertical color resolution comes from Henry de France, who found that the color information is almost identical for two continuous lines. Because the color information was designed to be a cheap, consistent addition to the backwards menocrom signals, because the color signal has less bandwidth than the luminance signal and hence the horizontal resolution is less. Fortunately, the human visual system is similar to the design: it experiences changes in the luminance of higher resolution than the change of chromium, so this disparity has a brief visual impact. It was logical to reduce the vertical color resolution.

In general, similar paradox is applicable in vertical resolution on television: Bandwidth of the video signal will be vertical resolution, even the picture will lose sharpness and will be washed in horizontal direction. Therefore, the video can be horizontally sharp compared to the horizontal. In addition, sending an image with too much vertical detail will create annoying flashes on television screens, because the small details will be displayed only one line (one in two intimate fields) and hence the frequency will be half refreshed. (This is a result of partial scanning that is blocked by progressive scan.) Computer-generated text and inserts should have a low pass filter carefully to prevent it.

As a result of the latest European efforts towards an analog standard, MAC systems are still used in sequam sequencing, the use of compressed color transmission concepts, which send the shorted U and V components over a period of time. The D2-MAC standard is especially in North European countries

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