WO2005015559A1 - 記録媒体再生装置 - Google Patents
記録媒体再生装置 Download PDFInfo
- Publication number
- WO2005015559A1 WO2005015559A1 PCT/JP2004/011715 JP2004011715W WO2005015559A1 WO 2005015559 A1 WO2005015559 A1 WO 2005015559A1 JP 2004011715 W JP2004011715 W JP 2004011715W WO 2005015559 A1 WO2005015559 A1 WO 2005015559A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- character
- recorded
- data
- recording medium
- code
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/18—Error detection or correction; Testing, e.g. of drop-outs
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
- G11B27/34—Indicating arrangements
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
- G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
- G11B2220/2537—Optical discs
- G11B2220/2545—CDs
Definitions
- the present invention relates to a recording medium reproducing apparatus having a function of reading a character code recorded on a recording medium, and particularly to a recording medium such as a CD, DVD, or MD.
- the present invention relates to a recording medium reproducing apparatus suitable for reading a character code recorded together with digital data for audio reproduction.
- a CD Compact Disk
- a CD-TEXT format includes not only digital data for audio playback recorded on a normal CD, but also the title of the song recorded on each track, the artist name, and the like.
- the character data for displaying the user name on the operation panel is recorded.
- This character data can also be written by the user using a CDR writer.
- Some CDs on which character data has been written using a CD-R writer may have data outside of the standard written due to user mistakes. If you try to display this as it is, you may see completely random characters. In some cases, a null code indicating a track delimiter cannot be detected, so the character data acquisition process does not end and the acquisition operation continues, and the subsequent audio playback process cannot be started. You can.
- the object of the present invention is to make CD-
- An object of the present invention is to provide a recording medium reproducing apparatus capable of detecting an abnormality in the data format of character data recorded on a recording medium and performing appropriate display processing.
- the recording medium reproducing device of the present invention forms the two-byte character code at the current confirmation position.
- a plurality of tracks of digital data for audio reproduction are further recorded on the recording medium, the text data is recorded corresponding to each track of the digital data for audio reproduction, and the special code is used to delimit tracks. Null code shown.
- the recording medium reproducing apparatus of the present invention further comprises: character position detecting means for detecting a character position of at least a part of the character code of the text data recorded on the recording medium; When the character position detected by the above is inconsistent with the character position information recorded on the recording medium, there is provided determination means for determining that abnormal data is recorded.
- a plurality of tracks of digital data for audio reproduction are further recorded on the recording medium, the text data is recorded corresponding to each track of the digital data for audio reproduction, and the character position corresponds to each track.
- the character position in the recorded character string is a plurality of tracks of digital data for audio reproduction.
- the above apparatus further includes an output unit that outputs a character corresponding to text data recorded on a recording medium, and the output unit stops outputting the character when the determination unit determines that the data is abnormal data. thing Is also possible.
- the above-described device may also be configured such that when the determination unit determines that the data is abnormal,
- FIG. 1 is a block diagram showing a schematic configuration of a CD player according to an embodiment of a recording medium reproducing apparatus of the present invention
- Figure 2 shows an example of character data recorded on a CD in the CD-TEXT format
- FIG. 3 shows the format of ID4
- FIG. 4 is a flowchart of a first example of the abnormal data detection processing according to the present invention.
- FIG. 5 is a flowchart of a second example of the abnormal data detection processing according to the present invention.
- FIG. 1 shows a schematic configuration of a CD-TEXT compatible CD player according to an embodiment of the recording medium reproducing apparatus of the present invention.
- the CD playback unit 10 reads the song name and artist name of the song recorded on the CD 14 from the read-in area of the CD 14.
- Read character data The read character data is temporarily stored in a memory 16 built in the control unit 12.
- the CD reproducing unit 10 reads a digitized audio signal from each track in the program area of the CD 14 according to a command from the control unit 12 to reproduce and output an audio signal.
- the control unit 12 is stored in the memory 16. Based on the stored character data, characters indicating the song title, artist name, etc. are displayed on the display unit 20.
- Fig. 2 shows the format of character data recorded on the R to W channels in the lead-in area of the CD in the CD-TEXT format. To simplify error handling, the read-in area has the character data shown in Fig. 2 repeatedly recorded multiple times.
- the character data is composed of a plurality of block forces of block 0, block 1,..., And each block is composed of a plurality of packs of pack (0), pack (1),. Each pack is 18 feet long.
- text data is written in the first 4 bytes of ID 1 to ID 4 followed by 12 bytes of character code.
- the text data is followed by a 2-byte CRC region, which is omitted in FIG.
- the first byte of the text data area of the pack whose ID 1 is 8F (hexadecimal, the same applies hereinafter) and whose ID 2 is 00 is used by the block to which it belongs.
- ID 1 is 8F
- ID 2 is 00
- the block is blocked.
- one-byte character code (ISO 646 ASCII) is used. Since 80 is recorded at the beginning of the text data area of pack 1 with ID 1 of 8F and ID 2 of 00, block 1 uses two-byte characters (MS-JIS). Has been done.
- the album name and the song name of the song recorded on each track are continuously recorded.
- Null code 00 for 1-byte characters
- 00 00 for 2-byte characters
- the album name is recorded on the first page of the pack (0) force of the block 0 and the pack 1 (1), and the song name of the track 1 is packed after the null code 00. It is recorded over the third byte of (2), and the title of track 2 is recorded after null code 00.
- Nono 0 click (0) force album names are recorded in the 2 pi byte character codes over the 2 pi door first La pack (2), to Nuruko de 00 0 0 of 2 pi door Next, the title of track 1 is recorded in two-byte character code.
- the ID 4 of these packs records the character code identification bit, the block number, and the character position in the format shown in FIG.
- the character code is a one-byte character code or a two-byte character code.
- the first character of the text data of the pack is recorded as a number starting from 0, indicating the character position within the track to which the character belongs.
- the first character of the pack (2) of block 1 is the 13th character of the album name recorded with the 2-byte character code
- the track delimiter code is two-byte null code 00.
- FIG. 4 is a flowchart of a first example of the abnormal data detection processing based on the above idea.
- the text data confirmation position is set to an initial value such as the beginning of the text data of the block or the beginning of the track (step 100). It is determined whether the recorded text data is recorded in two-byte character code (step 1002), and if it is not recorded in one-byte character code However, one-pipe processing is performed as usual. This determination is made by referring to the first byte of the text data area of the pack whose ID 1 is 8F and ID 2 is 00 or the highest-order bit of ID 4 of each pack as described above.
- the track end position is detected normally. As a result, the process ends. If the text data at the current text data confirmation position is “XX00” (step 1006) or “00XX,” (step 1008), abnormal data is detected. If not, update the text data confirmation position by 2 bytes and repeat the process from step 104. With this, it is possible to detect an abnormality in the text data. As shown in the lower 4 bits of ID 4 of each pack, the first character of the text data of the pack is the hexadecimal single digit starting from 0, which is the character of the track to which it belongs. Therefore, the text data can also be determined by actually examining the character at the beginning or end of the pack and determining whether it is consistent with the information in ID 4. Different Always detect be able to.
- FIG. 5 is a flowchart of a second example of abnormal data detection processing based on this concept.
- the character count is reset to 0 (step 110), and the text data confirmation position is set to an initial value (step 1102).
- the character code is a one-byte character code
- the character count should be equal to the lower four bits of ID 4 of the next pack, and the character code would be a two-bit character code. If, the character quotient divided by 2 should be equal to the lower 4 bits of ID 4 of the next pack. If they do not match, abnormal data is detected. If they do match, the text data confirmation position is increased by 1 (step 1 1 1 2), and the processing from step 1 104 is repeated.
- the processing described above can be realized by software in which the operation of a CPU (not shown) built in control unit 12 in FIG. 1 is programmed.
- a playback apparatus capable of detecting an abnormality in text data recorded on a recording medium and performing appropriate display processing.
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
- Management Or Editing Of Information On Record Carriers (AREA)
- Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)
- Traffic Control Systems (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10/568,048 US7483352B2 (en) | 2003-08-12 | 2004-08-09 | Recording medium reproduction device |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003207363A JP3998611B2 (ja) | 2003-08-12 | 2003-08-12 | 記録媒体再生装置 |
| JP2003-207363 | 2003-08-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2005015559A1 true WO2005015559A1 (ja) | 2005-02-17 |
Family
ID=34131426
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2004/011715 Ceased WO2005015559A1 (ja) | 2003-08-12 | 2004-08-09 | 記録媒体再生装置 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US7483352B2 (ja) |
| JP (1) | JP3998611B2 (ja) |
| KR (1) | KR100733060B1 (ja) |
| CN (1) | CN100498965C (ja) |
| WO (1) | WO2005015559A1 (ja) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110083811A (zh) * | 2019-04-14 | 2019-08-02 | 杭州拓深科技有限公司 | 一种设备运行现场回放的方法 |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4525719B2 (ja) * | 2007-08-31 | 2010-08-18 | カシオ計算機株式会社 | 階調補正装置、階調補正方法、及び、プログラム |
| JP5809520B2 (ja) * | 2011-10-24 | 2015-11-11 | 大阪瓦斯株式会社 | 貯蔵タンク運用計画導出システム及び方法 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59153227A (ja) * | 1983-02-18 | 1984-09-01 | Toshiba Corp | デ−タエントリマシンの文字表示方式 |
| JPH1115672A (ja) * | 1997-06-23 | 1999-01-22 | Brother Ind Ltd | データ格納状態判定方法及び装置 |
| JP2000113644A (ja) * | 1998-08-06 | 2000-04-21 | Sony Corp | 再生装置 |
| JP2000156074A (ja) * | 1998-11-20 | 2000-06-06 | Alpine Electronics Inc | Mdプレーヤのタイトル表示方法 |
| JP2003009060A (ja) * | 1999-05-28 | 2003-01-10 | Matsushita Electric Ind Co Ltd | 半導体メモリカードの再生装置 |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6459060A (en) * | 1987-08-28 | 1989-03-06 | Matsushita Electric Industrial Co Ltd | Nondestructive inspection instrument |
| JP2765973B2 (ja) | 1989-08-07 | 1998-06-18 | 三洋電機株式会社 | 回転ヘツド式デジタル記録再生装置のデータ表示方法 |
| JPH07121333A (ja) | 1993-10-27 | 1995-05-12 | Dainippon Printing Co Ltd | プログラム作成方法及び装置並びにプリントイメージデータ作成方法及び装置 |
| JPH10247357A (ja) | 1997-03-06 | 1998-09-14 | Sony Corp | 再生装置 |
| US6174170B1 (en) * | 1997-10-21 | 2001-01-16 | Sony Corporation | Display of text symbols associated with audio data reproducible from a recording disc |
| JP3915228B2 (ja) * | 1998-02-25 | 2007-05-16 | ソニー株式会社 | 再生方法および記録媒体 |
| JPH11297040A (ja) * | 1998-04-07 | 1999-10-29 | Sony Corp | 再生信号処理装置 |
| JP3587681B2 (ja) * | 1998-04-28 | 2004-11-10 | パイオニア株式会社 | テキスト情報再生装置 |
| JP3954322B2 (ja) * | 2001-04-27 | 2007-08-08 | 株式会社東芝 | 情報記録媒体、情報再生装置、情報再生方法 |
| JP3692068B2 (ja) | 2001-12-10 | 2005-09-07 | 株式会社東芝 | 録画再生装置及び記録メディア検査方法 |
-
2003
- 2003-08-12 JP JP2003207363A patent/JP3998611B2/ja not_active Expired - Fee Related
-
2004
- 2004-08-09 US US10/568,048 patent/US7483352B2/en not_active Expired - Fee Related
- 2004-08-09 KR KR1020067000022A patent/KR100733060B1/ko not_active Expired - Fee Related
- 2004-08-09 WO PCT/JP2004/011715 patent/WO2005015559A1/ja not_active Ceased
- 2004-08-09 CN CNB2004800177576A patent/CN100498965C/zh not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59153227A (ja) * | 1983-02-18 | 1984-09-01 | Toshiba Corp | デ−タエントリマシンの文字表示方式 |
| JPH1115672A (ja) * | 1997-06-23 | 1999-01-22 | Brother Ind Ltd | データ格納状態判定方法及び装置 |
| JP2000113644A (ja) * | 1998-08-06 | 2000-04-21 | Sony Corp | 再生装置 |
| JP2000156074A (ja) * | 1998-11-20 | 2000-06-06 | Alpine Electronics Inc | Mdプレーヤのタイトル表示方法 |
| JP2003009060A (ja) * | 1999-05-28 | 2003-01-10 | Matsushita Electric Ind Co Ltd | 半導体メモリカードの再生装置 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110083811A (zh) * | 2019-04-14 | 2019-08-02 | 杭州拓深科技有限公司 | 一种设备运行现场回放的方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| KR100733060B1 (ko) | 2007-06-28 |
| CN100498965C (zh) | 2009-06-10 |
| KR20060028805A (ko) | 2006-04-03 |
| US7483352B2 (en) | 2009-01-27 |
| CN1813306A (zh) | 2006-08-02 |
| JP2005063486A (ja) | 2005-03-10 |
| US20060206750A1 (en) | 2006-09-14 |
| JP3998611B2 (ja) | 2007-10-31 |
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