is this implementation very different from having a 16-bit ADC in normal sensors
16-bit ADCs increases tonal granularity in the readout, which can help in the darker tones. A sensor site may be capable of differentiating about 12 bits worth of meaningful information, hence there's a good argument for overshooting that in the ADC. Our eyes, even if not sensitive to more than 8 bits worth of tonal gradation, are perceiving in a logarithmic space (vs. the sensor recording in a linear space), hence extra information in the shadows can be quite good. Plus the extra bits give more room in which to tune a captured image. An article such as http://www.scantips.com/basics14.html gives a rundown on this.
The extra bits don't help if the incoming light exceeds the sensor's recording capacity, hence the interest of this "modulo" discussion for over-exposed images.
Comments
16-bit ADCs increases tonal granularity in the readout, which can help in the darker tones. A sensor site may be capable of differentiating about 12 bits worth of meaningful information, hence there's a good argument for overshooting that in the ADC. Our eyes, even if not sensitive to more than 8 bits worth of tonal gradation, are perceiving in a logarithmic space (vs. the sensor recording in a linear space), hence extra information in the shadows can be quite good. Plus the extra bits give more room in which to tune a captured image. An article such as http://www.scantips.com/basics14.html gives a rundown on this.
The extra bits don't help if the incoming light exceeds the sensor's recording capacity, hence the interest of this "modulo" discussion for over-exposed images.