As we need to record, store, and/or transmit the screen contents, which refer to videos/images generated/rendered by computers or some other electronic devices, Screen Content Coding (SCC) is important and indispensable, and has been used widely for various applications, e.g., desktop sharing, video conferencing, and remote education. Unlike natural videos/images, screen contents may not be very smooth and usually contain lots of characteristics that depend on which category they belong to. For text or graphics contents, for instance, it is much sharper and with high contrast, so users can easily perceive the abnormality if any little artifact exists. Thus, a very high fidelity of the decoded video/image is usually required for coding screen contents. To handle well these contents can promote the development of many applications, and even make more new applications possible, and that's what we work for. (Reference: JCTVC-B084)

SCC現在已經在各種不同的應用上佔有重要的地位,例如:遠端桌面分享,視訊會議,遠距離教學等。當這些應用被廣泛的使用同時,儲存這些資訊也是必要的。如果我們能夠適當的處理這些資料,許多設備的效能將得到提升,或者我們可以藉由這項技術,開發不同的應用方式。
SCC不會像一般的圖片檔那樣的自然,通常會因為不同的種類而有不同的特性。舉例來說,文字或圖形內容可能會是較為銳利且高對比內容。而由於高對比度的特性,任何一點不自然的圖形出現時,使用者可以很輕易的發覺,所以編碼需要很低的失真度,而這正是我們研究的方向。

Contact
Chun-Chi Chen (陳俊吉)
Tel: +886-3-5712121 ext.59267