 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
TW2864D Datasheet(PDF) 20 Page - Renesas Technology Corp |
|
|
|||||||||||||||||||||||||||||
TW2864D Datasheet(HTML) 20 Page - Renesas Technology Corp |
|
|
20 / 110 page  TW2864 FN7745 Rev. 0.00 Page 20 of 110 September 28, 2012 FIGURE 7. THE EFFECT OF CROPPING REGISTERS Video Scaler The TW2864 can independently reduce the output video image size in both horizontal and vertical directions using arbitrary scaling ratios up to 1/16 in each direction. The horizontal scaling employs a dynamic 6-tap 32-phase interpolation filter for luma and a 2-tap 8-phase interpolation filter for chroma because of the limited bandwidth of the chroma data. The vertical scaling uses simple line dropping algorithm. Therefore, the use of non-integer vertical scaling ration is not recommended. Downscaling is achieved by programming the horizontal scaling ratio register (HSCALE) and vertical scaling ratio register (VSCALE). When outputting unscaled video, the TW2864 will output CCIR601 compatible 720 pixels per line or any number of pixels per line as specified by the HACTIVE register. The standard output for Square Pixel mode is 640 pixels for 60 Hz system and 768 pixels for 50 Hz systems. If the number of output pixels required is smaller than 720 in CCIR601 compatible mode or the number specified by the HACTIVE register, the 12-bit HSCALE register, which is the concatenation of two 8-bit registers SCALE_HI and HSCALE_LO, is used to reduce the output pixels to the desired number. |
|
Link URL |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link to Datasheet | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
