User talk:Mittonswain

SCH Phase Display

SCH (Subcarrier to Horizontal) phase refers to the phase relationship between the leading edge of horizontal sync (at the 50% amplitude point) and the zero crossings of the color burst (by extrapolating the color burst to the leading edge of sync). The error is referred to as SCH phase and is expressed in degrees of subcarrier phase. For PAL, the definition of SCH phase is slightly different due to the more complicated relationship between the sync and subcarrier frequencies—the SCH phase relationship for a given line repeats only once every eight fields. Therefore, PAL SCH phase is defined, per EBU Technical Statement D 23-1984 (E), as “the phase of the +U component of the color burst extrapolated to the half-amplitude point of the leading edge of the synchronizing pulse of line 1 of field 1.” SCH phase in important when merging two or more video signals. To avoid color shifts or “picture jumps,” the video signals must have the same horizontal, vertical, and subcarrier timing and the phases must be closely matched. To achieve these timing constraints, the video signals must have the same SCH phase relationship since the horizontal sync and subcarrier are continuous signals with a defined relationship. It is common for an encoder to allow adjustment of the SCH phase to simplify merging two or more video signals. Maintaining proper SCH phase is also important since NTSC and PAL decoders may monitor the SCH phase to determine which color field is being decoded.

Proposed deletion of SCH Phase Display


The article SCH Phase Display has been proposed for deletion&#32;because of the following concern: "Article has been tagged as unsourced for over a decade - I did a Google search and the subject does not seem to be notable."

While all constructive contributions to Wikipedia are appreciated, pages may be deleted for any of several reasons.

You may prevent the proposed deletion by removing the notice, but please explain why in your edit summary or on the article's talk page.

Please consider improving the page to address the issues raised. Removing will stop the proposed deletion process, but other deletion processes exist. In particular, the speedy deletion process can result in deletion without discussion, and articles for deletion allows discussion to reach consensus for deletion. Chidgk1 (talk) 17:46, 8 December 2023 (UTC)

Nomination of SCH Phase Display for deletion
A discussion is taking place as to whether the article SCH Phase Display is suitable for inclusion in Wikipedia according to Wikipedia's policies and guidelines or whether it should be deleted.

The article will be discussed at Articles for deletion/SCH Phase Display until a consensus is reached, and anyone, including you, is welcome to contribute to the discussion. The nomination will explain the policies and guidelines which are of concern. The discussion focuses on high-quality evidence and our policies and guidelines.

Users may edit the article during the discussion, including to improve the article to address concerns raised in the discussion. However, do not remove the article-for-deletion notice from the top of the article until the discussion has finished. Chidgk1 (talk) 17:45, 13 December 2023 (UTC)