TW508566B - Decoding system of disk and its method - Google Patents

Abstract

The present invention provides a decoding system of disk and its method for receiving message and performing decoding operation. The decoding system includes a demodulation device, a data buffer area, an ECC decoding device, a data registering medium, a de-scrambler and EDC verification device, and an ATAPI interface device. The data buffer area and data registering medium are used to temporarily store ECC data blocks. The decoding method of the decoding system comprises the following steps. At first, the demodulation device receives the message of the disk and performs demodulation operation to generate ECC data block into the data buffer area, wherein the ECC data block includes main data, parity of inter-code and parity of outer-code. Next, the ECC decoding device reads the ECC data in the data buffer area for being written into the data registering medium, and also performs error correction decoding in the PI direction. Then, the ECC decoding device reads the ECC data block in the data registering medium for performing error correction decoding in the PO direction. Next, the EC decoding device writes the corrected part of the ECC data block into the data registering medium, and also writes the corrected part of the main data into the data buffer area. Then, the de-scrambler and EDC verification device reads the corrected main data in the data registering medium for performing de-scrambling and EDC verifying operation. After completing the above operations, the ATAPI interface device will de-scramble the main data in the data buffer area for outputting to the host side.

Description

508566

FIELD OF THE INVENTION The present invention provides a decoding system and a method for decoding a disc. A decoding system and a method for reducing the number of accesses to a data buffer to improve the resolution of a disc. Background to prior art

Please refer to Figure 1. Figure 1 is a block diagram of the decoding system of a conventional DVD player. As shown in Figure 1, after reading the data from the disc, the data is first transferred to the EFM Plus demodulation device (Eight tQ

Modulation Plus demodulator) 102, demodulate 16 channel bit code words (C0 (ie word) into 8-bit data symbols.) Then, the EFM Plus demodulation device 102 Error correction code data block (Err

Correction Code data block (ECC data block for short) 107 is stored in the data buffer 1 0 via the bus (bus) 1 0 4 where E cc data block 1 0 7 includes the main data (main D ata) 1 0 8 , Parity of Outer-code (referred to as p0) n0 and Parity of Inner-code (referred to as pi) i12. The main information i〇8 plus / external matching code 1 1 0 is collectively referred to as M (ed-g00 1 mn) external code 'and the main information 1 08 plus the external matching code 丨 io and The internal verification code i 2 is collectively called the RS internal code. Secondly, the error correction code decoding device (ECC decoder, ECC decoding device for short) Π4 from the data buffer 106

Page 5 508566 V. Description of the invention (2) Takes ECC data block 1 07, sequentially decodes in the X direction (that is, the pl direction) and the Y direction (that is, in the direction of p0), and the ECC data area The erroneous data in the block 107 is corrected, and then the ECC decoding device 1 14 rewrites the corrected part in the ECC data block 107 into the data buffer 〇0. Then, a de-scrambler and an error detection code confirmation device (Error

Detection Code check (referred to as EDC confirmation device) 116 reads the corrected main data 108 in the data buffer 106, and performs descrambling and edc confirmation operations. When the host wants to read the data in the data buffer 106,

Via ATAPI (Advanced Technology Attachment Packet

Interface) interface device 118 descrambles the main data 108 and transmits it to the host. ^ Figure 2 of the oatmeal. Figure 2 is a flowchart of the data buffer access of the conventional DVD player decoding system. This process includes the following steps. First,

Step 201 is performed. The EFM Plus demodulation and conversion device 1 02 writes the demodulated ecC shell material block 107 into the data buffer 106. Next, step 202 is performed. The ECC decoding device 114 reads the data block 107 in the η direction from the data buffer and performs an error correction decoding operation, and then writes the corrected part in the data block 107. Data buffers 丨. :, Then = step 202 'In step 203, the ECC decoding device 114 reads the ECC data block in the direction of P'0 from the data buffer 106 and performs decoding-action of error correction, and then performs ECC The corrected part of the data block 〇07 is written into the data buffer 106. After completing step 203, it ’s set according to the requirements of the system. Repeat step 202 and step 203 to improve the Ecc data block 1007. After entering step m ’, descrambler and E]) c

508566 V. Description of the invention (3) The confirmation device 11 6 reads the data buffer} ○ 108 has been corrected within ^ 108 to perform descrambling and EDC confirmation operations. After completing the main data, when the host wants to read the main data in the data buffer i 〇6, proceed to step 20 5 and send the main and secondary H to the host through the ATAPI interface device 118. end. In the above-mentioned conventional technique, the decoding module and the descrambling module need to perform the above steps to complete the decoding of the disc: From this, it can be known that each module of the conventional decoding system is All need to be buffered! 〇6 is stored, if in theory each module of the decoding system can access the data buffer synchronously, the speed of the decoding system can reach ^, in order to reach the high speed DVD system, all the modules need to use the same data In the process of decoding the entire ECC data block by the decoding system, the ECC decoding device 114 needs to access the data buffer 106 every time when it performs a fresh operation on the second ECC. Shibei ',, and "Xianchong area multiple access operations will make the entire decoding operation very time-consuming ::': Limit the speed of the overall DVD system. In view of this, there is already a solution for the above! A solution &, Including: improving the timing of the decoding system, the search for port buses, or reducing the number of accesses to the data buffer. Summary of the invention * and its main purpose is to provide a decoding system for discs; ^, , No need to improve the timing of the decoding system, and no need to increase the bus. In other cases, only a slight change to the architecture of the decoding system is required to reduce 508566. 5. Description of the invention (5 " " " " " " " " " " & qu ot; " 1 .......................... * ~ —— Data; the number of accesses to the red zone, so that the solution can be improved. 7 ^^ · The ability to further accelerate the speed of the decoding system to achieve a high speed of parallel processing, a simple explanation of the figure of 0. Figure 1 is a block diagram of the decoding system of a conventional DVD drive. = Second Series of Knowing Access map of decoding system of DVD optical disc player. The flow chart of τ £ is a flow chart of the preferred embodiment of the decoding system of the present invention. The flow chart of the decoding system of the present invention is. Figure 4 is the decoding of the present invention. The flow chart of the system's access to the data buffer. The number of the components in the illustration indicates the number of 100, 300 discs, 1 04, 304 bus 1 07 '30 7ECC data block 1 1 0, 3 1 0 external allocation code A 114, 314ECC Decoding | Set 11 * 8 '320ΑΤΑΡΙ interface device

102, 302 EFM Plus demodulation device 1 0 6, 3 0 6 data buffer 1 08, 308 main data 1 1 2, 3 1 2 internal allocation code 1 16, 318 descrambler and EDC confirmation device 3 1 6 Detailed description of the invention of the data staging media

Page 8 50S566 V. Description of the invention (5) In order to make the purpose, features and advantages of the present invention-preferred embodiments, and cooperate with; ^ more obvious and easy to understand 'Next · scare the drawings, make details For description, please refer to FIG. 3, which is a block diagram of an example of the present invention. The best implementation of the decoding system and system shown in Figure 3 is that the code device purchase_series = 2: foreign capital office i ^ I ^ 30 7 ^ # ^ «3 1 6 Positive solution and burial: The defeated green ancestor Shenliu Liulinlinca dissolves the horse. After that, the ECC decoding device selects the ECC data block in the temporary storage medium and corrects the decoding error. However, the ECC decoding ：： The corrected part of block 307 is written into the data temporarily, and then the ECC material will be stored. The history IMP will be hit τ τ τ ′ in the manic body 316, and also: the main corrected part in 308 Write data buffer 3: The confirmation device 318 reads the data temporary storage medium 316 and the key material 308 to perform decoding and ED (: confirmation operation. Please refer to Figure 4. Figure 4 is the decoding system of the present invention In the process i ^ 6, the second, f: 40 0, like the decoding device 31 4 reads the ECC data block 3007 in the data temporary storage ^ 316. Next, it proceeds to step 402, and judges step 4tf, Go to the EC! Data block 307PI direction decoding. If it is, then go to the line p / into the direction of decoding; if not, go to step 406, go to 408, decode. At the end of execution After 4〇4, then proceed to step 1 to check whether the correction has been completed, or whether the decoding has been performed for many times. If it is, then go to step 4 丨 2; if not, proceed to step 4. , Continue to decode in the direction of ρ〇. After executing the outline of the steps, go to step 41〇 to determine whether it has been corrected, or it has been on page 9. V. Description of the invention (6) 4 ^ · Xuji's angle, The midday code and motion still cannot be corrected. If yes, then go to step _Right 'to go to step 404 to continue decoding in the PI direction. 乂 In step 412, 隹 1 undescrambles the main data 308 from p. And EDC confirm action. Then, proceed to step 414 to determine whether the EDC confirmation result of the main data 308 is correct. If yes, the decoding is successful, indicating that the φ data 308 of the ECC data block 307 is correct, and can be transmitted through the ATapiS device 32. The output is directly outputted to the host; if not, the decoding fails, and the block 307 is incorrect. Please refer to Figure 5 for the L / Slave. Figure 5 is the process of accessing data in the decoding system of the present invention. Figure. This process includes the following steps: First, execute = FM Plus demodulation and conversion device 3202 will demodulate the ECC data buffer zone 3006; second, execute step 502, ECC decoding = set 314 hectares to take the lean material buffer 306 The Ecc data block 3007 is written into a temporary storage medium 316. At the same time, the ECc data block 3007 is decomposed and the erroneous data in the ECC data block 307 is corrected. 2 'Go to step 5G3, the ECC decoding device 314, part cf data block 30, and some writers are temporarily stored in the media 316, and the main data correction part is also written into the data buffer 306; Next, step 504 is executed, the ECC decoding device 314 reads the data block 307 in the temporary storage medium 316, decodes in the PO direction, and corrects the incorrect data in the ECC data block 307. Continued steps 504. In step 505, the coding device 314 writes the corrected portion of the 1 ^ * 3 tribute block 307 into the data medium 316. At the same time, it also writes the corrected portion of the main data 308. In the tributary buffer zone 3 06 · 'To be completed after step 505, according to the needs of the system 50S566

508566

Page 12 508566 9L ― 1 _Case No. 89124235_ Year Month Day Amendment Simple Description of the Page 13 2002.05. 23.013

Claims (1)

4 ^ 5 ^ ΟΠ1 OAOOC correction 6. Scope of patent application1. A decoding system for a disc, which performs a decoding operation. The decoding system includes: the disc's message data and a demodulation conversion device for receiving a change operation to generate an ECC data block. ", Poor material" and demodulation data CC negative material block contains a main two =, an internal verification code and an external verification code; to: breeding buffer to temporarily store the Ecc data block; : Poor material temporary storage medium 'is used to temporarily store the ECC data block; code; CC decoding device is used to correct the error of the Ecc data block. The device is used to read the main data that has been deleted and stopped. Data, the next to η and the sub-synchronization descrambling and EDC confirmation actions; material, AP1 interface device, used to read the main I frame in the data buffer; EC on the / material descramble output To the host side; when the ECC% code device from the resource oblique #, the ECC data block is wrong at the same time. Second: Take the ECC lean block line π direction error correction solution: wrong connection storage , The material is temporarily stored in the media, and the ECC data in the temporary storage medium is merged (! ^ 者, = C The code device reads the positive solution mEcci = to make the error correction in the P0 direction. The 16 channels are two or two lines long, in which the demodulation codec is demodulated into 8 bits Page 14 2002 * 〇 5.23 • 014 2 · As the scope of patent application No. 1 year EFM Plus demodulation device of the shell symbol. Among them, the ECC decoding, among which the data is buffered, where the data is temporary, and the data is temporarily, and the demodulation is changed. 3. The solution described in item 1 of the patent application scope is a decoding algorithm structure of an RSPC. &Apos; ,, ' 4. The buffer area described in item 1 of the patent application scope may be a DRAM.统. System 5. The storage medium described in item 1 of the scope of patent application may be an SRAM. Ma Tongtong 6. The size of the storage medium as described in item 1 of the patent application scope is equivalent to one ECC data block. 7 · The solution described in item 1 of the scope of patent application ^ ^ ^ ^ ^ device, the ECC decoding device and the ATAPI interface, and ^ ^ access to the data buffer / face device decoding method through the bus' It is used to receive the message data of the disc and perform the lamp decoding operation. The decoding method includes: a track demodulation device, the demodulation device ^ generates an ECC data block, an internal distribution code and an external (1) Read the message data of the disc to a set to demodulate the message data. The ECC data block contains a main data matching code. (2) Write the ECC block to a data buffer. (3 ) Read the EGC data block to —EGG decoding device and _f temporary storage media, and perform the ECC data block?丨 Error correction decoding in the direction; ', (4) Read the ECC data block in the data temporary storage medium to perform error correction decoding in the direction of p0; (5) Correct the ECC in the lean temporary storage medium Data block and the data buffer 508566 —__ Prime No. 89124235 __ ^ Ά-§- VI. Scope of patent application --- ~ The main data in the red zone; (6) Read the main data scrambler that has been corrected in the temporary storage media of the data Device and EDC device to perform descrambling and EDC confirming actions; 1 to ~ (7) read the main data in the data buffer to an ATAPI, and descramble the main data and output To the host. Interface installation 9 · As described in the patent application scope item 8 decoding method, Longye also demodulate the encoding characters with 16 channel bits into g-side modulation data symbols. Device. ", Bit number 10 · The decoding method as described in item 8 of the patent application scope, in which the code device is an RSPC decoding algorithm architecture. Λ ECC solution 11. The decoding as described in item 8 of the patent application scope Method, the re-flushing area can be a dram. /, The poor material is delayed, and the data is temporarily 1 2 The decoding method storage medium as described in item 8 of the patent application scope can be a SRAM. The decoding method described in item 8, wherein the size of the data temporary storage medium is equivalent to one E (: c data block. 2: Dedicated = two. The decoding method described in item 8, wherein the demodulation is changed ^ The 4 decoding device and the ATAP 1 interface device access the breeding buffer through a bus. 2002. 05. 23.016