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Power saving methode and system

A subsystem, buffer memory technology, applied to power consumption reduction of electronic mass storage devices, such power consumption reduction of infotainment products. It can solve problems such as inflexibility and reduction, and achieve the effect of minimizing power consumption

Inactive Publication Date: 2007-01-03
KONINKLIJKE PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this solution is inflexible because different bit rates to / from storage devices require the two buffer parts to have different ratios
Also, the number of physical chips and internal memory banks determines that the power consumption in this design is fixed and cannot be further reduced from the design disclosed in JP-2000298935

Method used

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  • Power saving methode and system
  • Power saving methode and system
  • Power saving methode and system

Examples

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Embodiment Construction

[0018] According to an embodiment of an aspect of the present invention, the characteristics of the following three entities are in the steps of method 3 (such as image 3 shown) is adaptively determined and optimized to minimize subsystem 2 (as figure 2 Shown), the subsystem 2 includes a mass storage device 21, such as HDD, and an SDRAM buffer memory 22:

[0019] ●HDD 21 or optical bit engine

[0020] ●SDRAM scheduling buffer 22

[0021] • Bit rate of the audio / video stream 24 .

[0022] The data flow 23 from the HDD to the buffer 22 / to the HDD is usually performed at a fixed rate, where the rate is fixed for a given HDD location. Since data is read from the disk at a constant angular velocity, the actual velocity usually varies with position on the disk. Actual values ​​can be determined in each case, or average values ​​can be used for a given stream. In addition, the data rate of constant angular velocity (CAV) optical drives is also position dependent. Constant Lin...

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PUM

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Abstract

The present invention relates to reduction of power consumption of electronic mass storage devices, and more particularly to such a reduction of power consumption in mobile infotainment products. These devices are equipped with a subsystem comprising a mass storage device (48) and a buffer memory (43, 44). The size of the buffer memory (43, 44) is adapted in such a way that optimally low power consumption is achieved. This accomplishment by activating or deactivating memory banks (45) comprised in the buffer memory chips. The amount of memory banks (45) activated is determined by operating characteristics of the subsystem, e.g. a desired bit-rate to be achieved for transmissions to / from the mass storage device (48).

Description

technical field [0001] The present invention generally belongs to the field of energy saving by reducing the energy loss of electric energy supply systems; in particular, it relates to the reduction of power consumption of electronic mass storage devices; Power consumption reduction. Background technique [0002] A removable storage device usually includes a mass storage device, such as a hard disk drive (HDD) or an optical bit engine. The power consumed by these HDDs or optical bit engines constitutes the vast majority of the total power consumed by such mobile devices. Since such a portable device, such as an infotainment device, operates on a limited power source (ie, a battery), it is desirable to operate on a fully loaded battery for as long as possible before the battery is replaced or recharged. This is one of the reasons why the device needs to consume as little energy as possible. [0003] When using such storage devices, a basic method of saving power is to turn...

Claims

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Application Information

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IPC IPC(8): G11B19/02G11B20/10G06F1/32G06F3/06
CPCG06F3/0625G11B19/02G06F1/3221G11B2020/10629G11B20/10527G06F3/0674G06F1/3225G11B2020/10675G06F3/0656Y02B60/1246Y02D10/00G06F3/06G06F1/32G11B20/10
Inventor J·P·范加塞尔O·梅苏特J·H·M·科斯特
Owner KONINKLIJKE PHILIPS ELECTRONICS NV
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