Interlacing Flicker/Jitter, File Format

2.3.15Interlacing (Flicker/Jitter)

A video frame is made up of two video fields. These two fields are interlaced and each contains half of the infor- mation required to display the frame. Due to timing drifts in video equipment, the two fields do not interlace perfectly causing the flicker/jitter commonly seen on sharp edges and fine lines.

This is more evident in horizontal lines than vertical. This problem is not evident on computer displays because they are usually non-interlaced.

To avoid these flicker/jitter problems, thin (e.g. single pixel) horizontal lines should be avoided and the overall image should be blurred, using either gaussian or other suitable methods.

2.3.19Image Size

Each highlight on any page should be contained in its own separate TIFF file. Each image should only be as big as the text or graphic itself and should not have any white space around the graphic. It should also be big enough to include the registration mark. Please make sure to always supply two images of the same dimensions per highlight, one with and one without registration mark.This allows closer pla- cement of highlights on the page, as highlight files cannot overlap in a DVD menu.

One file that contains all the highlights for a page should also be provided. The colour depth and file format for this file should be the same as the other highlight files. Sample below.

Video

2.3.16File Format

The preferred file formats for menu background delivery are uncompressed TIFF or as video on a separate tape. If the artwork is made in Adobe Photoshop, it must be saved in PC format with no compression. Some gra- phics packages save an alpha channel with a 24bit file. DO NOT save the alpha channel.

2.3.17Naming Convention

For efficient and clear processing of the menu items, the following naming convention should be applied:

2.3.18Registration and Alignment

To facilitate positioning and alignment of high- lights/overlays on the backgrounds at Sony DADC, a file with registration marks should also be supplied with the main background file. This file should con- tain clearly visible registration marks in addition to artwork in the menu background file.

The registration marks can be of any type as long as they are accurate to one pixel width and height. They should also be of a colour that makes them stand out from the background.

The accompanying highlights/overlays should have a matching registration mark in a colour of the palette, which has not yet been used. This is discussed in detail later.

Menu background without…

…and with registration marks

2. DVD

DVD Rom/DVD Video specifications

Sony DVD-ROM/DVD Video technology has played a significant role in the evolution of home entertainment and data storage. Since its introduction in the late 1990s, this versatile format has enabled users to enjoy high-quality video and audio, making it a standard for movie distribution and video playback.

One of the main features of Sony DVD-ROM is its substantial storage capacity. A single-layer DVD can hold approximately 4.7 GB of data, which is significantly more than a standard CD, while dual-layer DVDs can store up to 8.5 GB. This increased capacity allows for higher-quality video content, including full-length movies, with multiple audio tracks and subtitles included.

In terms of video quality, DVD Video supports a resolution of up to 720x480 pixels, providing a clear and vibrant viewing experience. The technology utilizes advanced compression techniques, such as MPEG-2, to efficiently encode video files while maintaining high fidelity. This level of quality, coupled with the ability to offer surround sound formats like Dolby Digital and DTS, makes DVD a preferred choice for cinema-quality home viewing.

Another significant characteristic of Sony DVD technology is its robustness and durability. Compared to other media formats, DVDs are less susceptible to scratches and degradation, ensuring a longer lifespan for physical media. They also employ error correction technologies that help maintain data integrity, providing a reliable storage medium for both movies and computer files.

One of the innovative features of Sony's DVD technology is the menu and navigation system. Users can easily access different scenes, bonus content, and settings through an interactive graphic interface. This enhances the overall viewing experience, offering flexibility to skip chapters or access special features without hassle.

Sony has also embraced the evolution of DVD technology with the introduction of DVD-Audio and DVD-RAM formats. DVD-Audio provides superior audio quality, supporting multi-channel sound and higher sampling rates, catering to audiophiles. Additionally, DVD-RAM offers rewritable disk capabilities, making it suitable for data storage solutions that require frequent modifications.

In conclusion, Sony DVD-ROM/DVD Video technology has established itself as a cornerstone in digital media. With impressive storage capacity, superior video and audio quality, robust durability, and user-friendly navigation, it continues to influence the landscape of home entertainment. As technology progresses, understanding these characteristics becomes essential for consumers and content creators alike, ensuring they can make informed choices in a shifting digital era.