Yamaha AVC-50 AVC-50 OWNERS MANUAL - Page 17

When you view a video tape recording, use the Video Enhancer to substantially improve a non-enhanced tape, or to slightly improve an enhanced tape. Video Level Adjust the VIDEO LEVEL control until the image is of acceptable brightness. Sharpness Quality television broadcast images require no, or very little sharpness enhancement. Turn the SHARPNESS control clockwise to add a small amount of sharpness, if necessary, and to obtain the best edges and contours without false outlines or excessive snow. Look at the outlines of people and objects to determine the effect. Detail Only after determining the Sharpness setting should you adjust the Detail setting. Turn the DETAIL control clockwise to obtain tie best clarity of detail and texture without coarseness or excessive snow. Look at the surface areas of objects to determine the effect. Interaction Make minor adjustments to all the controls, if necessary, to obtain the best result Note: There is always a tendency to over-enhance the viewing image. The picture may seem better, but is actually worse in some respects. To compensate for this tendency, turn the Video Enhancer off and on as you adjust the controls to compare the before and after enhancement images. If you are in doubt the image is probably overenhanced. Turn the controls back until you see the best image Also, with some televisions, using a lot of enhancement may affect the vertical stability of the picture Recording Use the Video Enhancer to exaggerate detail and sharpness before recording, to compensate for the picture degradation that will occur due to video cassette recorders. Do not over-enhance as the image may tear or color shift To determine the best control settings, make short test recordings before attempting a full length recording. Begin with levels set for the best viewing and the PB/REC switch in, then increase the detail and sharpness control levels for each test. Play the test recordings back to determine the best settings. This enhancement will increase the coarseness and snow in the viewing picture. However, these effects will not appear during playback of the recording. These tests are time-consuming, but will become less necessary as you become more familiar with the Video Enhancer. Duplicating You should use the Video Enhancer every time you duplicate a video tape recording. In this way you can enhance before the tape loss, and only have to use a small amount of enhancement. This method also minimizes the amount of snow and image coarseness on the final copy. Always try to balance snow and picture improvement on low-quality recordings. On successive generations, detail deteriorates more than sharpness, so that a lot of detail enhancement may be necessary, while very little sharpness enhancement is. A many-generation tape may have no detail and lack sharpness. In this case it is unlikely you will be able to obtain a high quality picture but considerable improvement is possible AVC-50 li 17