TW518568B - Target segment searching method of searching medium and the reading device thereof - Google Patents

Abstract

The present invention relates to a target segment searching method of storage medium and the reading device, wherein the storage medium reading device comprises a demodulation device, a data buffer, and a decoding device of error correction code and reads a data segment in the storage medium and sends it to the demodulation device for generating an error correction data segment to be sent to the data buffer and the decoding device of error correction code respectively. Thus, the decoding device of error correction code can conduct the ID verification for the error correction code data segment in advance, preventing the condition of error data reading when conducting real data decoding, so as to achieve the effect of rapid and correct data reading.

Description

518568 A7 B7 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs. 5. Description of the invention (y ^ [Field of invention] > This post contains information on the method of searching for the purpose of storing I media and ... Refers to _ a method and device for searching for a target sector that can quickly and correctly read data. -5 [Learning Skills] Once a disc drive reads a data sector from an optical disc, it must first confirm If the target segment it is looking for, or if it is not the correct target segment, will not catch the wrong data segment for decoding. However, due to the process of disc compaction or other factors Often, the identification code 资料 in the data section stored on the 10 disc will be wrong, or the identification code of other data sections will be wrong but it will become the identification code of the target section, so that the optical disc drive finally finds the target section and When I started decoding, I found that the target sector was wrong and I had to search again. Therefore, how to make the optical disc drive find the target sector quickly and correctly becomes an important issue. 15 The former method and system for searching a segment in a storage medium are: • a DVD drive, as shown in the first figure, the DVD drive 丨 mainly includes a degrading device 11, a data buffer 12, and an error correction Code Conxion Code (hereinafter referred to as ECC) decoding device ^, a descrambling and error coding confirmation device 14 and an ATAPI (Advanced Technology 20 Attachment packet Interface) device, 15; when the DVD drive 丨 search When one of the target sectors on a disc 10 is used for material extraction, the read / write head of the optical disc 10 performs a long-range search on the disc J 0, so that the read / write head moves quickly to the vicinity of the target sector, and then Find the destination sector with a short search. First of all, its read and write head will read out one purpose. Page 4 (Please read the precautions on the back before filling this page)

1. The paper size of the 1T line is applicable to China National Standard (CNS) 8-4 specifications (210 > < 297 mm) 518568 A7 V. Description of the invention (2) The data section near the section is sent to the demodulator 丨 丨To make a judgment, the demodulation and conversion device 11 verifies the identification code (ID) of the data segment according to an identification error detection code (hereinafter referred to as IED) in the data segment. When the verification result is correct, that is, It indicates that the identification code of the data segment is correct. The read-write head calculates the distance from the target segment based on the identification code of the data segment to find the destination segment, and then starts from the destination segment of a When the data section in the optical disc is sequentially stored in the data buffer ί2, so that an error correction code (ECC) data block 16 is accumulated, as shown in the first figure, the The ECC 10 data block 16 includes, in addition to the main data 161, an internal verification code (hereinafter referred to as PI) 162 and an external verification code (hereinafter referred to as p〇) 163; Block 16 is sent to the ECC decoding device 13 for data decoding and error checking. To determine whether the information is read correctly. However, the above method of searching for a destination section may still find an incorrect destination section #, or mistakenly identify the wrong data section as the correct destination section, for two reasons: 1. As shown in the second figure , When the identification code of other data sections on the disc is wrong, for example, the next of 4CFFFF should be 4D0000, but it is mistaken as 40,000, and it just becomes the identification code of the target section you are looking for 400000, 20 and in the demodulation and conversion device 11 also meet the identification code error detection code (IED) check. Positive, or, after the identification code of other data sectors is decoded by the identification code error detection code, it becomes the identification code of the target sector you are looking for. The destination segment identification code is 400000, which will be mistaken for the correct page. The paper size is applicable to the standard (2 Shu 297 public holiday) (Please read the precautions on the back before filling this page) Printed by the Intellectual Property Bureau employee consumer cooperative _ Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs employee consumer cooperative, the identification code of the invention (10 identification code .. As shown in the first picture. The identification code of the other data section 'on the disc' occurred in the picture The indecision becomes 3FFFFF, and it just becomes the identification code of the shell material section near the target section __, and it also meets the identification code, which means that the other materials / material sections pass Identification code error detection code (IDIED), its identification code has just become the identification code 3FFFFF of the data section near the target sector, and was mistaken for the correct identification code. Therefore, when the above-mentioned ECC data block 16 is sent to the ECC decoding device 13 for data decoding, the code is read sequentially from the ^ direction and the p0 direction of the Ecc data block ^ and each data area of the data block is recognized again. The segment code is correct, and when the identification code is found to be wrong, the search operation of the destination segment must be performed again. This is because this conventional method is used at the demodulation converter U (please read the precautions on the back before filling this page). • 15 20 IED verification ID is correct, and can not completely check out the error of m, but can旎 Mistake the wrong ID into the correct ID, so that even if you can find the wrong ID later during ecc decoding, you must spend a lot of time re-searching for the target sector. As for ordinary DVD players, it needs to find the target sector The time is about 25 times to 80 times as long as the ECC data block is decoded. [Summary of the Invention] Therefore, the main object of the present invention is to provide a segment searching method for a storage medium and a reading device thereof, so that the target segment in the storage medium can be correctly found to achieve the effect of quickly reading data. According to the above purpose, the search method of the target section of the present invention is performed on a storage medium reading device to search for the correct purpose in the storage medium. The paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) ) ------------- 518568 A7 B7 V. Description of the invention (4) Section 10, and the storage medium reading device includes a demodulation device, a data buffer and an error correction The method includes &) reading one of the data segments in the storage medium to the demodulation device to generate an error correction code data segment, wherein the error correction code data segment Including an identification code, an identification code error detection code, and an internal matching code; and then sending the error correction code data section to the data buffer and the error correction code decoding device, respectively; (b) the error correction code The decoding device reads the identification code extraction code and the internal matching code in the error correction code data section, verifies the error correction code data & ·! And identifies the identification data, and returns the positive result of the verification. To the demodulation device; (c) The correct verification result finds the target segment in the storage medium, and the subsequent data segment is sequentially stored in the data buffer starting from the target segment, so that an ECC data block is formed and sent to the error correction. Code decoding device to decode; and (d) Repeat steps (a) and (b) according to the incorrect verification results; to achieve fast and correct reading of data 15 results (please read the precautions on the back first) (Fill in this page again)

Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. 20 In addition, the device for implementing the above method of the present invention includes a demodulation device, a data buffer, and an error correction code decoding device. The demodulation device is used for Receiving the material section in the storage medium and performing a demodulation operation to generate an error correction code data section, and the data section includes an identification code, an identification code error detection code, and an internal verification code. The data buffer is used to temporarily store the error correction data section sent by the demodulation device to form -ECC data area%; and the error correction is performed by the decoding device for the error correction sent by the decoding device. Code data section for identification code verification and errors in the data block from the data buffer page 7 This f-sheet scale applies to Guanjia County (CNS) from the specifications ... 518568 Intellectual Property Bureau of the Ministry of Economic Affairs Printed by employee consumer cooperative A7 B7 V. Description of invention (s) ^ Corrective decoding action; and the demodulation device will send the error correction code data section to the data buffer rabbit and the In the error correction stone horse decoding device, the error correction code decoding device verifies the identification horse of the error correction code data section. If the result of the positive correction is correct, the 5 code area section is found according to the identification code. 'Make the storage media read and start from the target area segment, and sequentially store subsequent data segments into the data buffer. After forming an Ecc data block, the ECC data block is sent to The error correction code is decoded ► t to perform demapping; otherwise, the demodulation device sends the next-error correction Shima data section to the data buffer and the error correction code decoding device to perform the identification code 10 times Verification until the correct data section of the verification result is found. By this, the effect of reading the data quickly and correctly is achieved. [Simplified description of the formula] In order to have a more detailed and clear understanding of the purpose, efficacy and characteristics of the present invention, The preferred embodiment of the present invention is described below with reference to the drawings: 15 The first diagram is a block diagram of a conventional reading device for a storage medium; the first diagram illustrates the identification of data segments in the storage medium. An example of a different code error; 'The second figure is another example of the identification code error in the data section of the storage medium; ^ 20 The fourth figure is a < Block diagram; 'The fifth figure shows the content of the data section in a preferred embodiment of the present invention; the sixth figure is a detailed flowchart of the method of a preferred embodiment of the present invention; page 8 of this paper size Applicable to China National Standard (CNS) A4 specification (210X297 public director) Pull clothes 1T ------ ^ (Please read the precautions on the back before filling this page) 518568 A7 B7 V. Description of the invention (6) The seventh picture It shows the composition of the ECC data section in a preferred embodiment of the present invention; and (Please read the precautions on the back before filling out this page) Figure 8 shows the ECC data in a preferred embodiment of the present invention What constitutes a block. 5 [Detailed description of the preferred embodiment] Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs First, please refer to the fourth figure, which is a schematic circuit block diagram of a preferred embodiment of the present invention. The searching method is performed in a storage medium reading device 2 to correctly search a destination sector in a storage medium 20. The storage medium reading device 2 is used as a bridge between the storage medium 20 and a host terminal for playing the storage medium 20 to read out the data stored in the storage medium 20 and transmit it to the host terminal for playback. And the storage medium reading device 2 is a DVD drive in this embodiment, and the storage medium 20 it accesses is an optical disk (such as an optical storage medium such as a DVD, VCD, or CD). Generally, when data is stored on the optical disc 20, a data sector 200 (data sector) 200 is used as the basic storage unit to sequentially store the data on the magnetic disc. As shown in the fifth figure, the data sector 200 includes a data identification code (hereinafter referred to as ID) 201, an identification code error detection code (hereinafter referred to as IED) 202, a main data 203, and an error detection code (EDC / CRC) 204, where the ID 201 includes The section number of the data section 200 is provided, and the IED 202 is used to debug 20 the ID 201 to prevent ID 201 from making errors during the data writing process. Please refer to the fourth figure again. The DVD player 2 mainly includes a demodulation and conversion device 21, a data buffer area 22, an Error Correct Code (ECC) decoding device 23, and more工 器 28。 28. Page 9 This paper size applies to China National Standard (CNS) A4 (210X297 mm) Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs

101520 518568 V. Description of the Invention (When preparing a DVD player 2 to search for a disc, it must first find the data. 4 pens can be played in order to read the data. Therefore, DV ^ is set (ie, the target sector) Then track, move the reader 2 ^ for long-range seek to the vicinity of the track where the material is stored, and set a short-range seek to find the destination section where the money entered the lack of starting position. Of course, the master write head It ’s not as soon as it enters the short field section, usually it can be found immediately by the brother ▲ ▲ Brother Huiluo usually confirms that the data section is correct on a data section in front of the target section. After…, Mumbai 枓 £ slavery, and then based on the data area #, the correct position of the target sector was deduced, and the target sector was found. Therefore, the method of the present invention 'as shown in the sixth ®' includes the following Steps: ⑷ First perform ^], during the short-range tracking of the DVD player 2, read out a data sector located near the target sector from the optical disc 20 and send it to "Heijie" week t: device 21. Then proceed Step 31 丨, the demodulation device 2! For the data section 2 0 0 performs demodulation and generates a corresponding error correction code data section (hereinafter referred to as the ECC data section) 21, please refer to the seventh figure, the ECC data section 210 includes the original identification of the data section in addition to Code (hereinafter referred to as ID) 211, identification code error detection code (hereinafter referred to as IED) 212, main information 213, in addition to an internal verification code (hereinafter referred to as PI) 214 that can perform horizontal debugging and a vertical orientation Detected external matching code (hereinafter referred to as P0) 215. The demodulation device 21 then simultaneously sends the ecc data section 210 to the data buffer 22 and the error correction code through a bus 24 at the same time. Device 23. The data buffer area 22 is used to temporarily store the ECC data sections 210 transmitted from the demodulation and conversion device 21, so that the ECC data sections 210 are accumulated to a certain number to form an ECC data block 25. Later, page 10 This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) gutter (please read the precautions on the back before filling this page) 518568 A7 B7 5. Description of the invention (8) (please first (Read the notes on the back and fill out this page) Send the ECC data block 25 The ECC decoding device 23 performs decoding, and referring to the fourth figure, the ftECC data block 25 includes a main data 251, a vertical internal verification code (hereinafter referred to as PI) 252, and a horizontal external verification code (Hereinafter referred to as P0) 253, and as shown in Fig. 8 and Fig. 8, the main data 251 is composed of a plurality of (in this embodiment, 16) the data section 200 of the fifth picture. (B) Then, step 32 is performed, and the error correction code decoding device 23 (hereinafter referred to as the ECC decoding device) starts to verify the ID 211 of the ECC data section 210. Originally, the ECC decoding device 23 was used to decode the ECC data block 25 sent from the data buffer 10 22, and the so-called decoding refers to the PI 252 and PO 253 in the ECC data block 25 respectively. The main data 251 of the ECC data block 25 performs vertical and horizontal decoding and debugging. Therefore, in the conventional technology, before the ECC data block 25 in the data buffer area 22 is not formed, the ECC decoding device 23 is always in an idle state and is not properly utilized. Therefore, the present invention uses ECC to decode the idle time of the printed device 23 of the consumer cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs, and the demodulation direction of the demodulation conversion device 21 is exactly the same as the vertical (PI) decoding direction of the ECC decoding device 23. Characteristics, the ECC decoding device 23 is used to perform ID verification on the ECC data section 210 sent by the demodulation and conversion device 21, so as to early check whether the position of the read data section 200 20 is correct, and to prevent subsequent ECC data areas When the block 25 is decoded, it is found that the data is incorrectly read and it takes a lot of time to find the destination sector again. Therefore, when the ECC decoding device 23 does not decode the ECC data block 25, it reads the IED 212 and PI 214 in the ECC data section 210. The ID 211 of the ECC data section 210 is on page 11 This paper size applies to China National Standard (CNS) A4 (210X297 mm) ~ ^ 18568 V. Description of the invention (9) 10 15 Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 20

Perform verification and return the verification result to the demodulation device 2 丨. The verification method is as follows: 1. If the PI 214 data containing ID 211 (that is, the main data 213 plus PI 214) fails to be decoded by the ECC decoding device 23 (that is, the sector number of the ECC data sector 210 contained in id 211 is incorrect) , It is regarded as an error. If the decoding is successful, the decoded ID is checked by ieD 2 12 again to further confirm whether it is the correct ID. In addition, in addition to the above verification method, the present invention may also use another verification method as follows: Prior to the demodulation device 21, the ID 211 is decoded by using the IED 212, and then the PI 214 including the ID 211 and the IED 212 is decoded. The data (that is, the main data 213 plus PI 214) is decoded by the ECC decoding device 23. If the decoding is successful (that is, the sector number of the ECC data sector contained in ID 211 is correct), the decoded ID is regarded as correct ID, otherwise it is treated as error ID. (c) With the above, step 32 丨, when the ECC decoding device 23 verifies that the ID 211 result of an ECC data section 210 is correct, it goes to step 33 |, and the DVD player 2 will be based on the ID 211. The included sector number is used to estimate the location of the target sector in the optical disc 20. Then, step 34 |, the DVD drive 2 starts its read / write head from the destination sector, and successively reads the data sector 200 after the destination sector into the demodulation and conversion device 21, and passes the demodulation and conversion device After 21 is converted into ECC data section 210, it is sequentially stored in the data buffer 22, and when a certain number of ECC data sections 210 are accumulated to form an ECC data block 25, the data buffer 22 ECC Page 12 This paper size applies to Chinese National Standards (CNs) A4 (210X297 mm)

I— HH -------- Approved clothing II (Please read the precautions on the back before filling this page) Thread 518568 A7 B7 V. Description of the invention (1 () (Please read the precautions on the back before filling (This page)

The data block 25 is sent to the ECC decoding device 23 for decoding. In addition, during the accumulation of ECC data block 25 in the data buffer 22 by the ECC data area bismuth 210 in the ECC data area 23, the ECC decoding device 23 will still perform | ^^ | 210 performs ID verification. Until the 5 ECC data block 25 is sent to the ECC decoding device 23 for decoding, the ECC decoding device 23 does not perform ID verification on the subsequent ECC data sections 2 to 10. This is because in addition to the fact that the ECC decoding device 23 needs to decode the ECC data block 25 and has no time to verify the ID of the ECC data section 2 and 10, another reason is because the data section 200 is continuously stored on the optical disc 10 On 20, when it has been determined that the found target sector is the correct sector position, the data sector 200 following the target sector must also be correct, so there is no need to go through the ECC decoding device 23 again. Verified again. Then, when an ECC data block 25 is sent to the ECC decoding device 23, step 35 | is required to enable the ECC decoding device 23 to decode the 15 ECC data block 25 and correct incorrect data. Therefore, when the consumer cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs prints and uses the ECC decoding device 23 to temporarily store the ECC data section 210 in the data buffer 22, it first performs ID verification on the ECC data section 210. The correctness of the read-in data section 200 is confirmed in advance, and the ECC decoding device 23 can be effectively and fully utilized without 20 idle time. (d) When the verification result of the identification code is incorrect, repeat step 30 and step 32. That is, when the ECC data section 210 is sent to the ECC decoding device 23 for ID verification, it is found that the ID 211 of the ECC data section 210 is wrong (that is, the ECC data section 210 fails to be decoded by PI or the ECC data section 210 is resolved. Page 13 This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) 518568 Five A7 ______B7_, description of the invention (^ Set 21 to decode with IED 212 and decode by ECC decoding device 23 fails), then ECC decoding The device 23 returns to the demodulation and conversion device 21, and the demodulation and conversion device 21 continues to perform ID verification of the next ECC data section 210. Therefore, as in step 30, the demodulation and conversion device 21 then sends The incoming 5 data section 200 is demodulated to generate the next ECC data section 210 in sequence and sent to the data buffer 22 and the ECC decoding device 23, respectively. The ECC data section 21 of 22 is erroneous data (ID error), so the next ECC data section 210 sent to the data buffer 22 will overwrite the previously existing ECC data section 210. Then, the | In 32 丨, the ECC decoding device 23 applies the next ECC data. Section 210 performs Π) check and annotation. This action will be repeated until it finds the ECC data section 210 with the correct ID, and then infers to the ECC data section 21 of the target ID. Otherwise, before this, these follow-up The ECC data section 210 stored in the data buffer 22 will always cover the previously existing ECC data section 210. Therefore, when the DVD drive 2 finds the destination sector by the above method and decodes the ECC data block 25 composed of the subsequent data sectors starting from the destination sector in & West 35 |, please also Referring to the fourth and sixth figures, the ECC data blocks decoded by the ECC decoding device 23 are sent back to the data buffer 22 through the data bus 24 again. Then, a descrambling and error detection code confirmation device 26 reads the main data of the ECC data block 25 in the data buffer 22 through the bus 24 to perform descrambling and error debt code reading and recognition operations. Then, when the host wants to read the data in the data buffer 22, it will execute 0¾ through-Advanced Technology Attachment Encapsulation 15 20 p. 14 This paper is suitable for financial purposes_ 家 县 (^ cNS) The Ministry of Economic Affairs Intellectual Property Printed by the Bureau ’s Consumer Cooperatives 518568 A7 B7 V. Description of the Invention (Advanced Technology Attachment Packet Interface (ATAPI) device 27 descrambles the main data in ECC data block 25 and sends it to the host for playback. In addition, In the above method, the ECC decoding device 23 achieves the connection and multiplexing switching with the demodulation and conversion device 21 and the data buffer 22 through the multiplexer 28. When the ECC decoding device 23 does not decode the ECC data block 25 When the multiplexer 28 connects the demodulation device 21 and the ECC decoding device 23, the demodulation device 21 can send the ECC data section 210 to the ECC decoding device 23 for ID verification. When the data buffer 22 has When the ECC data block 25 needs to be decoded 10 times, the multiplexer 28 connects the data buffer 22 to the ECC decoding device 23. The data buffer 22 can send the ECC data block 25 to the ECC decoding device 23. decoding, At this time, the demodulation device 21 can no longer send its ECC data section 210 to the ECC decoding device 23. In summary, the present invention utilizes the ECC decoding device 23 to wait for the ECC data 15 idle time of the block 25, and the ECC decoding device 23 and The demodulation device 21 has the same decoding direction and cooperates with a multiplexer 28, so that the data section 200 read by the DVD player 2 is demodulated by the demodulation device 21 to generate an ECC data section 210 and sent to the data. The buffer area 22 is temporarily stored and sent to the ECC decoding device 23 for ID verification at the same time to confirm in advance whether the ID of the ECC data section 210 20 is correct, and then based on finding a more correct data section, Only read the target section and subsequent data sections, so that after forming the ECC data block 25, it is sent to the ECC decoding device 23 for decoding, thereby preventing the ECC decoding device 23 from decoding the ECC data block 25. Only when I found that I read the wrong information and had to spend a lot of time to find the destination sector again, page 15 This paper size applies the Chinese National Standard (CNS) A4 specification (210X 297 mm) I --- 1 ---- ------- IT ------ 0 •-(Please read first Note the surface to fill out this page)

518568 A7 B7 five

I. Description of the invention (y improves the lack of known technology and improves the speed of reading data / data of the DVD drive 2. ^, Therefore, the present invention is a progressive design, but there is no similarity or similarity. The article was disclosed in the city, and it has already met the patent requirements of novelty, and applied in accordance with the provisions of the exclusive law. However, the above mentioned are only the preferred embodiments of the present invention, so the application of the description of the present invention And the equivalent structure of the scope of patent application should be included in the scope of patent of the present invention. Yanzhuang II ^ (Please read the precautions on the back before filling this page} Intellectual Property Bureau, Ministry of Economic Affairs, Consumer Consumption't

Page 16: Zhang scale is applicable to Chinese National Standard (CNS) A4 specification (210X297 mm) 518568 V. Description of the invention (y 2 21 23 25 26 27 [component number comparison] Storage media reading device ^ 2〇 demodulation Installed Fong Nong I 22 Error Correction Code (ECC) Decoding Device 24 Error Correction Code (ECC) data block descrambling and errors 彳 Test horse confirmation device Advanced Technology Attachment Packet Interface (ATAPI) device storage media data buffer confluence Row multiplexer 200 data segment 202 identification code error detection code (ΙΕ〇) 204 error detection code (Edc) 210 error correction code (Ecc) data segment 2 12 identification code error detection code (ied) 2 15 External match code (ρ〇) 252 Internal match code (PI) 201 Identification code (id) 203 Main information 21 1 Identification code (ID) 2 1 3 Main information 2 14 Internal check code (PI) 251 Main information 253 External Distribution Code (PO) --1 II-II ---- II-Order •. (Please read the precautions on the back before filling this page) Printed by the Consumers' Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs Page 7 1X Paper size suitable for wealth and family (CNS) A4 specification (210X297 mm)

Claims (1)

^ 18568 'Shenqing Patent Scope 10 15 Φ The zone 20 printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs # Also the search method is performed in a storage medium reading device, and the storage medium reading device It includes a demodulation device, a buffer material, and an error correction code decoding device. The data buffer is used for temporarily storing multiple data sections to form an error correction stone data block. The method includes the following steps: · Read the data section in the storage ㈣ to the fH demodulation and conversion device, so that a corresponding error correction code data section is generated, where the error, error correction code data section contains an identification code, an identification Code error detection code and an internal matching code; then send the error correction code data section to the data buffer and the error correction code decoding device; (b) the error correction code decoding device reads the error correction The code error detection code and internal matching code in the code data area are used to verify the identification code of the error correction code data section and return the verification result to the demodulation device; (c) According to the correct Of The result of the verification finds the target segment in the storage medium, and the subsequent data segment is sequentially stored in the data buffer from the target segment, so that an error correction code data block is formed and sent to the error correction. The code decoding device performs decoding; and (d) repeats steps (&) and 0) based on the incorrect verification result. The method according to item 1 of the scope of patent application, wherein in step (c), the error correction code decoding device waits for the data buffer to be transmitted. During the error correction code data block, the demodulation device continues to receive data sections from the storage medium and generate corresponding error correction code data sections to the data buffer and the error correction device C8. Mountain-D8… please request the patent scope to check the identification code until the error is renewed .. The device will interrupt the error if the device receives the error mape block from the data buffer. Remaining of identification code 5. Error correction code block decoding operation. .L method according to item 1, wherein the storage medium _ 疋 ',' ', an optical disc, and the storage medium reading device is a DVD drive. 4 kinds of storage media reading device for searching-10 destination area in storage medium for correct data reading operation; the device includes: a demodulation device 'for receiving one of the storage medium Data = segment and perform demodulation to generate _error correction code data section, and the error correction code data section contains an identification code, an identification code detection code and an internal verification code; 15 anxiety buffer The area is connected to the demodulation device for temporarily storing the error correction code data section transmitted by the demodulation device to form an error correction code data block; and printed by the Consumers ’Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs An error block correction code decoding device is made, and is connected to the demodulation and conversion device and the shell buffer respectively to perform the verification of the error 2q correction code, material area and the identification code from the demodulation and conversion device, and Decode the error correction code data block from the data buffer, and the demodulation device transmits the data section of the error correction code to the data buffer and the error correction at the same time In the positive code decoding device, the error correction code decoding device is to identify the data section of the error correction code. Page 19 The paper size applies the Chinese National Standard (CNS) A4 specification (ϋ ^ 97 publicly replied 518568 VI. Patent application Range code advance: check positive, right test result is correct, that is, to find the slave of the target area according to the identified Shima, so that the storage medium sequence reading device is opened from the target area segment #: the subsequent data sections are sequentially Store it in the data buffer and wait for the 'composition-error correction code data block', then send the error correction code data block to the error correction code decoding device for decoding; otherwise, read Send the next error correction code data segment to the data buffer and the error correction code decoding device to perform the verification of the identification code again until a data segment with a correct verification result is found. The storage medium reading device described in item 4 of the patent scope, the error correction code decoding device uses the error correction code data ^ 4 identification code error detection code and the internal matching code to the identification code Perform verification. 6 The healthy media reading device described in item 4 of the patent, wherein the error correction rank correction stone horse decoding device does not correct the error correction code data area = during decoding, the identification of the error correction code data section is performed. The code verification is 5 until the error correction sent from the data buffer is received: the data is transferred, the identification code verification work is not interrupted, and the error correction code block is decoded. 7 ^ Patent Domain No. The wealth media reading device described in item 4, 1 storage medium 疋 is a _disc, and the storage medium reading device is a dvd player. 5 10 15 line 20 page 20 This paper standard applies to China country # ^ nS) A4 gauge