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Content recording and reproducing apparatus, disk device, and controlling method thereof

A technology of reproduction device and magnetic disk, applied in recording/reproducing/deleting method, digital recording/reproducing, configuration/installation of recording head, etc., can solve problems such as command queue recording not suitable for PVR, undesired change of command, etc.

Inactive Publication Date: 2004-06-16
HITACHI GLOBAL STORAGE TECH NETHERLANDS BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] However, since the data (frames) are time-sequenced in the HDD used by the PVR, it is not desirable to change the order of command execution
Command queue recording is not suitable for PVR

Method used

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  • Content recording and reproducing apparatus, disk device, and controlling method thereof
  • Content recording and reproducing apparatus, disk device, and controlling method thereof
  • Content recording and reproducing apparatus, disk device, and controlling method thereof

Examples

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Embodiment Construction

[0034] Hereinafter, the present invention will be described in detail based on the embodiments shown in the drawings. In this embodiment, a PVR (Personal Video Recorder) that records and reproduces motion data using a magnetic disk as a recording medium will be exemplified. Also in this embodiment, MPEG2 will be used in encoding motion data.

[0035] FIG. 1 is a block diagram showing the configuration of main components of a recording and reproducing apparatus (PVR) 100 according to the present embodiment.

[0036] The recording and reproducing apparatus 100 includes an encoding unit 10 for inputting and encoding a video or image signal representing a moving image so as to generate motion data, a data storage unit 20 for storing the motion data generated by the encoding unit 10, and a data storage unit 20 for reading and a decoding unit 30 that decodes motion data stored in the data storage unit 20 and outputs the decoded data, and a controller 40 for controlling operations o...

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Abstract

A head position estimator estimates the present position of a head relative to a recording medium, an LBA calculator for calculating positions of a data block to be read next and other data blocks existing before and after the data block, and a moving destination determiner for determining a data block at which the time required to move the head is the shortest, as a data block to be read next, on the basis of the present position of the head, which has been estimated by the head position estimator, and the positions of the respective data blocks, which have been calculated by the LBA calculator.

Description

technical field [0001] The present invention relates to control for reading data when reproducing digital contents such as moving pictures recorded in a disk-shaped recording medium such as a magnetic disk. Background technique [0002] As the storage capacity of magnetic disks increases, PVRs (Personal Video Recorders) corresponding to digital video recorders using magnetic disks as recording media are now becoming common. PVRs generally utilize MPEG2 (Moving Picture Experts Group 2) as a recording system. Motion data can be captured as screen data sets of still images (frames) arranged on a time-series basis. [0003] Figure 8 It is a figure showing the data structure of MPEG2. [0004] In MPEG2, such as Figure 8 As shown, data is managed by a GOP (Group of Pictures: coding unit adopted in MPEG2) to which a sequence header (SH) (sequence layer) is added. Each GOP is described with three types of screen data I, P and B frames. A GOP usually consists of an I frame and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/781G11B5/55G11B20/10G11B21/08G11B27/10H04N5/92H04N9/804
CPCG11B5/5547G11B21/083G11B2220/2545G11B27/105H04N5/781G11B2220/218G11B2220/2562H04N9/8042G11B20/10
Inventor 田村哲也内田博押川浩木下尚行
Owner HITACHI GLOBAL STORAGE TECH NETHERLANDS BV