An ink-jet recording apparatus, including: a recording portion movable to eject ink to perform image recording; flexible ink supply tube connected to the recording portion; and an ink-supply portion for supplying the ink to the ink supply tube. The chain to be sharpened can be progressed and automatically gripped by the lowering of the grinding wheel into a grinding position. Comparator 105a generates a differential signal which indicates the difference between the transmission signal and a compensation signal. In addition, the resolution and signal-to-noise characteristics of an image displayed on the screen can be evaluated based on the measured MTF. 05 lbton to about 15 lbton, based on dry fiber, of one or more aldehyde functionalized polymers comprising amino or amido groups wherein at least about 15 mole percent of the amino or amido groups are functionalized by reacting with one or more aldehydes and wherein the aldehyde functionalized polymers have a molecular weight of at least about 100,000. The second program may include the first content configured to be played back at a second speed different from the first speed, and the second caption stream may include second captions different from the first captions.