In the Encoding drop-down menu, select one of the following:
• Raw – Pixel data is sent in left-to-right scanline order, and only rectangles with changes are sent after the original full screen has been transmitted.
• RRE – Rise-and-Run-length-Encoding uses a sequence of identical pixels that are compressed to a single value and repeat count. This is an efficient encoding for large blocks of constant color.
• CoRRE – A variation of RRE, using a maximum of 255x255 pixel rectangles, allowing for single-byte values to be used. More efficient than RRE except where very large regions are the same color.
• Hextile – Rectangles are split up in to 16x16 tiles of raw or RRE data and sent in a predetermined order. Best used in high-speed network environments such as within the LAN.
• Zlib – Simple encoding using the zlib library to compress raw pixel data, costing a lot of CPU time. Supported for compatibility with VNC servers that might not understand Tight encoding which is more efficient than Zlib in nearly all real-life situations.
• Tight – The default and the best encoding to use with VNC over the Internet or other low-bandwidth network environments. Uses zlib library to compress pre-processed pixel data to maximize compression ratios and minimize CPU usage.