The heart of the TTL Serial Camera module (the product page at Adafruit named it as TTL Serial JPEG Camera) is the VIMICRO VC0706 Digital video Processor. The following are some of the features that a VC0706 digital video processor has:
CMOS sensor interface and digital video input interface, so it can capture video using the CMOS sensor or external TV decoder
Embedded TV encoder and video DAC, so it can directly output NTSC/PAL video streams to TV monitors and other 75 ohm display devices
Preimage processing and M-JPEG compression ability
NTSC video output resolution up to 712 x 486
PAL video output resolution up to 704 x 576
Maximum frame rate; 60fps @ 27MHz in NTSC and 50fps @ 27MHz in PAL
Ability to change the brightness, saturation, and hue of images
Auto brightness and auto contrast adjustment
Motion detection
The VC0706 chipset specification mentioned that it supports both NTSC and PAL but the TTL Serial Camera module only implemented NTSC.