CN1412759A

CN1412759A - Method for reducing buffer depletion and producing frequency

Info

Publication number: CN1412759A
Application number: CN 01136520
Authority: CN
Inventors: 陈凌风
Original assignee: Lite On IT Corp
Current assignee: Lite On IT Corp
Priority date: 2001-10-15
Filing date: 2001-10-15
Publication date: 2003-04-23
Anticipated expiration: 2021-10-15
Also published as: CN1206649C

Abstract

The present invention provides a method for reducing buffer BURN generation frequency, and is characterized by that it utilzies the change of disk etching speed of optical drive to reduce buffer BURN generation frequency. At starting, the optical drive and receive dala to be etched from optical system or application program, when the received data is reached to some critical value, the etching motion can be activated, and the current time value and data quantity in the buffer can be recorded, and when the BURN takes place, the current time value and the previously recorded data quantity and time value are undergone the process of arithmetric treatment so as to obtain the difference value of speed of transferring data of system and etching speed of optical drive and use optimum etching speed to raise etching quality and efficiency of optical disk.

Description

Reduce the method for buffer depletion and producing frequency

Technical field

The invention provides a kind of reduction buffer zone and empty (BUFFER UNDER RUN, hereinafter to be referred as BURN) method of occurrence frequency, particularly transmit the speed of data and the difference of CD-ROM drive etch-recording speed by computing system about a kind of, the etch-recording speed of optimization CD-ROM drive, with the number of times of reduction BURN generation, and improve the quality and the efficient of disc imprinting.

Background technology

Along with the doubly increase of speed of CD writer imprinting, the speed that system transmits data also must follow-up just can reach best etching/recording quality and efficient.Yet, the speed that not all system transmits data is all got caught up in the etch-recording speed of CD-ROM drive, in case system transmits the speed of data when being lower than the etch-recording speed of CD-ROM drive, will make in the buffer zone (Buffer) data consumes totally, the phenomenon that buffer zone is emptied promptly takes place, and causes the imprinting failure.

Modes such as common improving technology such as BURN Proof, Just Link, Super Link can be proceeded the action of imprinting when BURN takes place, further avoid the imprinting failure; No matter used technology why, all can't avoid the reduction of etching/recording quality fully; Again activate the imprinting action and also can spend the unnecessary time.

In addition, when the speed difference of etch-recording speed and data transfer rate bigger, the frequency that BURN takes place higher (be the number of times that takes place of BURN the more), then the quality of disc imprinting also can and then descend, and the time that is in fact spent during imprinting also far is more than the time at quarter that BURN does not take place; Another point it should be noted that, uneven because of disc quality on the market, and the situation of imprinting failure also takes place in the high etch-recording speed of healing more easily.

Therefore as from the foregoing, above-mentioned improving technology on reality is used, obviously has inconvenience and remains to be improved with the shortcoming existence.

Summary of the invention

In order to improve every shortcoming of ordinary skill, fundamental purpose of the present invention, be to calculate the velocity contrast of etch-recording speed and data transfer rate according to the time length that BURN takes place, initiatively to determine the best etch-recording speed of CD-ROM drive, avoid the unnecessary BURN phenomenon that high etch-recording speed caused, and improved the quality and the efficient of disc imprinting.

In order to reach above-mentioned purpose, the present invention mainly provides a kind of method that reduces buffer depletion and producing frequency, when reaching a certain critical value, the data volume of CD-ROM drive reception activates the imprinting action, and record time value at this moment and the data volume in buffer zone, when BURN takes place when, just time value is at this moment done computing with the data volume, the time value that write down before, transmit speed and the difference of CD-ROM drive etch-recording speed, the etch-recording speed of optimization CD-ROM drive according to this of data with the acquisition system.

Method by reduction buffer depletion and producing frequency of the present invention, need not increase additional circuit, need not see through external force yet, can realize that just CD-ROM drive determines the purpose of etch-recording speed automatically, and reduce the probability that imprinting is failed, and obtain preferable etching/recording quality and operational paradigm.

Description of drawings

Fig. 1 is the process flow diagram of imprinting action of the present invention.

Embodiment

Generally speaking, possess BURN Proof is arranged, Just Link, the CD-ROM drive of improving technologies such as Super Link, it can proceed imprinting when BURN takes place, its operating process is: when system transfers data to the buffer zone of CD-ROM drive, data in the buffer zone can increase, and when reaching a certain critical value, the data volume that receives activates the action of imprinting, at this moment, data meeting slow consumption in the buffer zone, if the data in the buffer zone are emptied, the phenomenon of so-called BURN promptly takes place, and imprinting action will stop, and the data volume the pending buffer district in is accumulated again and activated imprinting again when reaching a certain critical value and move.

And the present invention further is applied to above-mentioned technology, and firmware is improved, and the phase can be reduced the number of times that BURN takes place, and as shown in Figure 1, is imprinting action flow chart of the present invention, may further comprise the steps:

Step 100: at the beginning, CD-ROM drive is in original state;

Step 102: when reaching a certain critical value, the data volume in the buffer zone enters write state, and record time value T1, the data volume X in the buffer zone and etch-recording speed V1 at this moment;

Step 104: when taking place, BURN enters halted state, and record time value T2 at this moment;

Step 106: the speed that is calculated system's transmission data by above-mentioned T1, T2, X and V1 is V2=V1-[X/ (T2-T1)];

Step 108: again when the data volume in the buffer zone reaches a certain critical value, reenter write state, at this moment, must adjust the etch-recording speed of CD-ROM drive according to the value of V1-V2, promptly reduce the etch-recording speed of CD-ROM drive during greater than a certain critical value when the value of V1-V2;

Do step 110: whether all data all write disc? if not, rebound step 102 then; If then finish imprinting action 112.

By said method, can realize that CD-ROM drive determines the purpose of etch-recording speed automatically, and reduce the probability of imprinting failure, and obtain preferable etching/recording quality and operational paradigm.

Claims

1, a kind of method that reduces buffer depletion and producing frequency is applied to take place to reduce the CD-ROM drive that can proceed the imprinting action when buffer zone is emptied (BURN), it is characterized in that this method comprises the following steps:

(a) activate the imprinting action, and record time value n, data volume X and the CD-ROM drive etch-recording speed V1 in the buffer zone at this moment;

When (b) the generation buffer zone is emptied, record time value T2 at this moment;

(c) calculate the speed V2 that system transmits data by above-mentioned T1, T2, X and V1;

(d) judge that whether V1 subtracts V2 greater than a certain critical value, if then activating the etch-recording speed that reduces CD-ROM drive when imprinting is moved again; And

(e) after all writing disc, all data promptly finish the imprinting action.

2, the method for reduction buffer depletion and producing frequency as claimed in claim 1 is characterized in that, the expression formula of this step (c) is V2=V1-[X/ (T2-T1)].

3, the method for reduction buffer depletion and producing frequency as claimed in claim 1 is characterized in that, this CD-ROM drive can cooperate the technology of BURN Proof, Just Link or Super Link.