Sony RDR-GX7 Technical Notes - Page 24

RDR-GX7 Technical Notes Chapter 4-4 High quality image & sound Post processing to obtain the highest possible image quality from the disc created from the same frame in order to obtain a highly precise image. However, most sources created with a video camera are The RDR-GX7 has been designed not only to be a superior DVD shot in field units. Time elapses between these fields, so if they recorder, but also to offer a complete array of playback functions. are simply combined into a pair, the resulting video image Sony's flagship model DVD player the DVP-S9000ES, released becomes blurred. This is particularly noticeable during sequences towards the end of 2000, was used as a reference in the planning with rapid movement. and design of the RDR-GX7. Accordingly, the DVP-S9000ES Since the RGR-GX7 is expected to be used mostly to record contributed much of the high level digital technology adopted in programming which originates as video images, Sony has the RDR-GX7 for high quality images, along with other incorporated Pixel-by-Pixel I/P Conversion. This technology technologies developed specifically for top class performance assures the highest possible image quality when playing back not befitting a flagship model. Both commercially available DVD only film sources but also non-film sources such as television software, as well as DVD discs recorded by the RDR-GX7, can programs as well as content recorded using various types of be played back with the same high level of quality offered by camcorders. Sony's finest DVD players. Fortunately, all video images in a video sequence or program are s Precision Cinema Progressive not entirely composed of movement. For example, in car chase scenes, while the cars are moving quickly, buildings and the Sony's Precision Cinema Progressive system achieves clear and surrounding scenery remain still in relation to them. Therefore, beautiful output from all types of recorded discs, including DVD by separating the moving elements in a scene from those which software titles as well as discs recorded on the RDR-GX7 itself. are not moving, separate forms of video processing are possible. This system employs several key technologies, including Pixel- This is the concept behind Sony's Pixel-by-Pixel I/P Conversion. by-Pixel I/P Conversion and V-Edge Compensation, along with The images of the three previous fields are stored in memory, advanced video D/A converter with high bit rate and sampling allowing comparison with the current field. In a given image, if rate for enhanced performance. The following explains these the current odd-numbered frame's image is the same as a technologies in detail. previous odd-numbered frame's image, there is a high probability that this part is a still image, but if it is different, then Pixel-by-Pixel Active I/P Conversion this part is judged to be a moving image. Thus, in Pixel-by-Pixel In progressive video, the pairs of video fields of the interlace I/P Conversion, for pixels judged to be part of still images, pixels system are combined (in a process called I/P conversion) to from previous even-numbered frames are selected. For pixels create a single video frame. Since twice the number of horizontal judged to be part of moving images, interpolation data is created lines result, a more finely detailed video image is obtained. based upon the horizontal lines above and below the current odd- While a pair of fields are combined into an image, depending on numbered field image. In this way, Pixel-by-Pixel I/P Conversion whether the original source was originally created on film or was assures clear and beautiful progressive conversion of images shot with a video camera, this process is performed in an entirely originally created on video. different manner. Sources originally created on film are made up of a series of still images (film frames), so the two fields are Simplified Represenation of Pixel-by-Pixel Active I/P Conversion Operation Still processing Moving processing Still Part Still area processing Past field Moving Moving area processing Past field Current field Current field 24