How is high-definition different from digital television?
Digital television (DTV) is a transmission method that will continue to be used to broadcast high-definition signals. In the same way that audio quality was improved moving from analogue music cassettes to Compact Discs, a similar change is happening to television. The first stage of this has been to ‘digitise’ the existing analogue television system, that is to take the same picture information but broadcast it digitally rather that using analogue. The amount of picture information does not change, but digital transmission is more efficient than analogue resulting in a more consistent picture quality and an improved range of available channels. In time the next stage of this process will be to use this improved digital technology to deliver improved picture and sound quality; high-definition.
Related Questions
- Why doesnt the picture on my digital television fill up the entire screen? Why do bars on the top and bottom or sides of the picture appear with different programming?
- How is digital television different from the existing analog television service?
- How is high-definition different from digital television?
