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Volume control when changing channels

IP.com Disclosure Number: IPCOM000015773D
Original Publication Date: 2002-Mar-15
Included in the Prior Art Database: 2003-Jun-21
Document File: 1 page(s) / 36K

Publishing Venue

IBM

Abstract

Different channels (especially radio/TV) use different volume levels, due to different music styles and dynamic compression techniques.

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Volume control when changing channels

Different channels (especially radio/TV) use different volume levels, due to different music styles and dynamic compression techniques.

     It can be very disturbing switching from a low volume channel (eg Radio3, FilmFour) to a high volume channel (typical pop channel). This is especially a problem when channel searching, as the user cannot predict the likely level of the next channel.

     The solution is that volume is automatically reduced to a low level as channel is switched. It is then increased over a period of (say) half a second to a level determined from the volume of the new channel by normal automatic volume control techniques. The important feature is that the volume is reduced BEFORE the new channel is played, and then allowed to increase. It does rely on not attempt to detect the volume as quickly as possible after the switch.

     This could cheaply be built-in to modern equipment; especially appropriate are car radios and televisions. It could also be built-in to audio related computer software.

     Optionally, the first channel may be faded out over a very short time period (say quater second) before the switch.

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