Reproduction apparatus having a buffer for reducing the mean access time to an information carrier

A playback device and access time technology, applied in the field of buffer playback devices, to achieve the effect of reducing the number of access times

Inactive Publication Date: 2005-04-06
THOMSON LICENSING SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, multiple storage banks are required as well as the added expense of controlling

Method used

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  • Reproduction apparatus having a buffer for reducing the mean access time to an information carrier
  • Reproduction apparatus having a buffer for reducing the mean access time to an information carrier
  • Reproduction apparatus having a buffer for reducing the mean access time to an information carrier

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Experimental program
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Embodiment Construction

[0032] figure 1 A block diagram of a reproduction device with a buffer for reducing the average access time to an information carrier is illustrated. The reproducing device is for example a DVD reproducing device in which a sector S of the optical information carrier is scanned by a pickup PU, also called a read head, and supplied to the application memory via a track buffer TB used as a buffer or cache AM, in this exemplary embodiment, the application memory is also used to control the trace buffer TB. For requesting the sector number PSN of the information carrier, a control unit CU is provided which controls the pickup PU for finding the sector S required by the application.

[0033] If an application in the application memory AM requests to read a sector S, the application first looks in the control table CS in the application memory AM to see if the sector S is already present in the trace buffer TB. If the sector S does not exist in the trace buffer TB, the application...

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Abstract

The invention relates to a reproduction apparatus having a buffer for reducing the mean access time to an information carrier which has for example a discontinuous data structure or a relatively long access time.For writing sectors (S) to the buffer and for finding sectors (S) in the buffer, a control table (CS) with a number of place holders and three variables is provided, the place holders in each case pointing with an index to a subsequent place holder in an endless chain of place holders which is divided into three regions, in which a predetermined sector (S) in the order in the respective region is identified by one of the variables.Even though only one row of place holders is provided, multiple access to a plurality of sectors (S) written to the buffer is made possible with a low outlay by means of the control table (CS), so that the number of slower accesses to the information carrier is reduced and the mean access time is shortened.Application is envisaged for reproduction apparatuses with a small storage space, such as, for example, a DVD reproduction apparatus.

Description

technical field [0001] The invention relates to a reproduction device with a buffer for reducing the average access time of information carriers having, for example, an intermittent data structure or relatively long access times. Background technique [0002] The speed of the rendering device or drive will usually draw attention to the product. In the case of drivers, in particular, faster also means louder, and on the other hand, very few drivers actually achieve the specified maximum performance. Rather, more important for practical operation is the average speed or average access time during reading of DVD or CD media with intermittent data structures or relatively long access times. A drive that provides a constant high speed will also reliably reproduce audio and video files. In CD applications, the read head typically jumps from sector to sector, for example, to load an intermediate sequence or mission brief during playback. [0003] Access times can be reduced by f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/06G11B20/10
CPCG11B20/10527G11B2020/1062G06F2003/0691G06F3/0601G06F3/0656G06F3/06G06F12/08G11B27/10G11B27/32
Inventor 马科·温特阿克塞尔·科查尔
Owner THOMSON LICENSING SA
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