CN101740069A

CN101740069A - DVD (digital video disk) coding memory device

Info

Publication number: CN101740069A
Application number: CN200810228554A
Authority: CN
Inventors: 肖扬
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-11-05
Filing date: 2008-11-05
Publication date: 2010-06-16

Abstract

The invention discloses a DVD (digital video disk) coding memory device, relating to a coding device of DVD equipment and a method thereof and providing a coding device of DVD equipment and a method thereof. A coding process is reduced to one step and the processes of reading and storing data from a memory is reduced, thereby reducing the use level of the memory and bandwidth. The device comprises a control data additional device used for adding control data to data stored on a memory, an error detecting method additional device of an error detecting method for detecting whether stored data can be normally read or not, a coding device for selectively coding according data varieties, an error detecting method correcting device for correcting the error detecting method, an error correcting data additional device for correcting errors of the data, and a modulating device for transforming data signals.

Description

A kind of DVD coding memory device

Technical field

The invention relates to the code device of DVD equipment and method thereof.

Background technology

At present, the DVD storer is replacing the CD storer rapidly, compares with the CD storer, and the DVD storer can be stored the mass data that is equivalent to about its 7 times, and this is the advantage that it has.Traditional DVD storer is made of following components: the main frame that generates the data (sector data) of storing on the DVD storer; The intermediate data that sector data and code device by above-mentioned main frame generation generate in cataloged procedure is stored, till the terminal data of will encoding are input on the storage pulse generating means, just coded data is carried out memory storing always; Read the sector data in the above-mentioned storer, and its decoding processing is become can store into the code device of form data on the DVD storer; To become to store into the storage pulse generating means of the pulse mode on the DVD equipment by the signal transformation of above-mentioned code device output; Above-mentioned main frame is accepted necessary information of storage and control signal, and the control device that above-mentioned code device and storage pulse generating means are controlled.

More detailed theory, above-mentioned in other words code device are along with the different of the kind of DVD storer and coded data and change.Simultaneously, above-mentioned storage pulse generating means will become pulse mode from the reversing non-return-to-zero signal transformation of above-mentioned code device output, and it changes along with the difference of the kind of DVD storer, manufacturing company, storage speed.On the other hand, the data that are stored on the DVD storer form Lead-In Area in interior week, form leading-out zone in periphery.Simultaneously, between above-mentioned Lead-In Area and leading-out zone, form data.

To being stored in data on the DVD storer when playing, make the data of storage have certain randomness for the performance that improves broadcast.This process of giving the data randomness just is " coding ".But, be to store repeatedly with reference to coding region according to the AD HOC of data, the part with regard to utilizing this pattern that the performance of player is improved when playing.Therefore, must use other data and other coding method with reference to coding region.For this reason, the code device in the DVD storer has two code devices.Like this, through after twice cataloged procedure, the feature of utilizing original sector data to remain unchanged is in order to encode to the reference coding region and sector data to be adjusted into specific pattern.At the 1st code device through after the coding once, again at the 2nd code device to encoding once more through coded data in advance.

Summary of the invention

The object of the present invention is to provide a kind of code device and method thereof of DVD equipment, cataloged procedure is reduced to once, reduce the process that reads and store data in the storer.Thereby can reduce the consumption of storer, reduce bandwidth.

To achieve these goals, the code device of DVD equipment of the present invention has the feature that is made of following components: to the control data attachment device that is stored in the additional control data of data on the storer, the error-detecting method attachment device of the error-detecting method that can the data of storage normally read; The code device of encoding selectively according to the kind of data; The error-detecting method correcting device that above-mentioned error-detecting method is revised; The error correction data attachment device that the mistake of data is revised; The signal of data is carried out the modulating device of conversion.

Beneficial effect of the present invention:

Utilization of the present invention is according to the value of the situation of the carrying out decision of above-mentioned coding, the conversion of signals of data has the signal that coded data is converted to the NRZI form, the code device of DVD equipment and method thereof, it is reduced to one with code device, and make circuit structure become simple, cataloged procedure is reduced to once, and reduces the process that reads and store data in the storer.Thereby can reduce the consumption of storer, reduce bandwidth.

Description of drawings

Fig. 1 is the synoptic diagram that expression describes the structure of traditional DVD equipment.

Embodiment:

The present invention utilizes the value according to the ruuning situation decision of above-mentioned code device, be the signal that it can become data-switching the NRZI form, the coding method of DVD equipment has the feature that is made of following step: to the step that is stored in data on the storer additional and output control data and error-detecting method; The step that the data of above-mentioned output are encoded; The step that above-mentioned error-detecting method is revised; Add the step of the error correction data that the mistake of data is revised; The step that the signal of data is changed.Be that it is to encode selectively according to the kind of data.In addition, above-mentioned coding has following feature: be about to data storage at the reference coding region, and be positioned at the beginning sector according to data and whether partial data or total data encoded.Be about to data storage at the reference coding region, when data are arranged in the beginning sector of 16 continuous sectors, only 160 byte datas encoded.When data are not to be arranged in reference to coding region or are not to be positioned under the situation of 16 continuous beginning sectors, sector, then all data are all encoded.Code device and method thereof according to DVD equipment of the present invention comprise following components: append control data and output to the sector data (2048 byte) that is stored on the storer; To the data of storage when playing, for can confirm normal play and export the error-detecting method attachment device of 2064 bytes of the error detection coding that appends 4 bytes; At the reference coding region, when data were arranged in the beginning sector of continuous sector, data were encoded with data storage.When data are not to be arranged in reference to coding region or are not to be positioned under the situation of beginning sectors, 16 continuous sectors, the code device that all data are all encoded then; When data are positioned at reference to coding region, the error-detecting method correcting device that the additional error detection coding of above-mentioned error-detecting method attachment device is revised: be the error correction data attachment device of the additional error correction data that correct mistakes; Can to store on the DVD storer and convert thereof into the modulating device of the signal of NRZI form in order to make through coded data.At the reference coding region, when data were arranged in the sector of 16 contiguous sector beginning parts, above-mentioned code device was only encoded to 160 bytes with data storage.When data are not to be arranged in reference to coding region or are not to be positioned under the situation of 16 continuous beginning sectors, sector, then all data are all encoded.Thereby can bring into play the effect of the 2nd code device.But, in this case will, when carrying out error detection coding, will omit cataloged procedure, this is its existing problem.

Therefore, except that just keeping the state that does not carry out encoding with reference to data 160 bytes in the beginning sector of coding region and error detection coding.

Claims

1. a DVD coding memory device is characterized in that to the control data attachment device that is stored in the additional control data of data on the storer, the error-detecting method attachment device of the error-detecting method that can the data of storage normally read; The code device of encoding selectively according to the kind of data; The error-detecting method correcting device that above-mentioned error-detecting method is revised; The error correction data attachment device that the mistake of data is revised; The signal of data is carried out the modulating device of conversion.