DE19608957A1 - CD player - Google Patents

Abstract

The invention concerns a compact disc (CD) player with a read device for picking up data stored on the CD, said read device comprising a read-write memory for recording playing characteristics entered from outside and a display device to show the playing time which has elapsed at a given instant. In order to widen the range of possible uses of the CD player, it is proposed that an input device connected to the read-write memory should be provided to allow selective marking of discrete points in time within a continuous recording, these selective markings being available for recall to modify the partial playing time of the medium when replayed.

Description

The invention relates to a compact disc (CD) player a reading device for detecting stored on the CD information, with a read-write memory for recording of external input characteristics and a Display device for the current duration of the already like the given sound recording. The so-called record as Carrier of mechanically stored sound information is in the in recent years on a large scale through so-called compact discs replaced, so-called Music tapes offered. Records consist of the unzer breakable plastic polyvinyl chloride-polyvinyl acetate copoly merisat (PVCA). The (sound) information lies in a deflection a groove ver in a spiral from the outside to the inside running. The deflection of the groove follows one when playing Sapphire or diamond needle. With single-channel or monophonic Recording the groove is only in the horizontal direction steers in two-channel or stereophonic recording each at 45 ° to the horizontal. The records were played with so-called pickups, most of which work according to a magnet system. A small one from the scan needle-moving magnet swings between two fixed spools Len pairs for the left and right channel. Alternatively pickups with piezoceramic transducers are also used For higher demands, electrodynamic tonab used. To improve the playback quality is the digital record was first developed, at which the signal analogous to the sound event through an analog digi tal converter converted into a pulse code modulated signal. It then only consists of a sequence of short, equal lengths binary pulses. This includes the so-called compact disc non-contact scanning by the laser beam, which has the advantage that no wear and no malfunction  Scratches or dust can occur. Likewise omitted from the digital coding the noise and distorting the Fre quenzganges of damping and phase and the nonlinear Ver strains.

From DE 37 44 909 C2 a record player is known in which for setting the playback characteristics ons data taken from the disc intended for playback bar, read and contained in a record player Memory will be checked to see if this disk is already registered. Any storage area for the disks Identification data is a further storage area in each case assigned to correction data for the playback characteristic, namely, to turn up the volume or the frequency characteristic to take. The associated correction values should at least apply to the New recording of the plate can be entered and saved, so that any disk that is already registered taking into account stored correction data is reproduced.

The record player known from DE 37 44 909 C2 works according to the following method:
The data recorded on the disc are scanned by means of an optical scanner which includes a laser diode, an objective lens, a focusing device, a tracking device, a photodetector, etc. The output signal of the scanner is fed to a focusing circuit, a track servo circuit and a playback clock generating circuit which contains an RF amplifier. After reading in the disk identification data, which are recorded on the disk as catalog number, the data are stored at a corresponding address in a RAM. By comparing the disc identification data stored at the address of the RAM with the disc identification data stored in a predetermined area, it is determined whether the disc in question has already been played.

If this is the case, the stored data is used to check what volume and / or frequency characteristics (play speed) was selected during a previous playback are. The relevant playback characteristics become How used the record, possibly newly inserted characters Risks are saved as correction data and later considered. With that described in DE 37 44 909 C2 Turntable pursues the goal, the sound reproduction to improve.

Compared to the records mentioned above, compact Discs especially in the application areas of discotheques, Broadcasters or similar serious disadvantages. While it is possible with records, certain passages of music optically identify pieces (at different reflect xionsbehaviour of the record can passages with different NEN frequency profiles are recognized, such as. B. suspension a drums), so-called instrumental passages to the Use moderation or to fade into other pieces that is what you want when playing compact discs assigned, based on the existing digital time display check which passage to interrupt, crossfade or the like suitable and when the appropriate time is given is.

It is therefore an object of the present invention to provide a CD To create player, avoiding the first Because of the disadvantages mentioned, there are more possible uses be created.

This task is accomplished by a compact disc player Claim 1 solved, according to the invention one with the writing Read memory connected input device for optional Mar of discrete times in the area of one together has hanging sound recording, the optional markie to influence the partial playing time of the sound carrier can be called up when this sound carrier is played repeatedly  are. The input device mentioned, in the simplest case is given by a push button, enables each play len a sound carrier in the middle of a coherent Tonauf drawing a marker as such in an erasable Read-write memory (RAM) can be entered and at next play is retrievable, the retrieval being the Submission of control signals may include that too stopping music playback, changing volume, fading out or fading to a next track etc. are usable. In the simplest case, the user is after Stop playback when the time comes and perform fades and crossfades, etc. at his discretion In this way, the professional user of the Player individually determined music or other sound mark passages and the possible uses of the Improve playback device, similar to a record.

Further developments of the invention are in the subclaims described.

So preferably the display device for the current one Duration designed such that in addition the remaining term to the next or selected markers becomes. In particular, this can take the form of a bar chart show happen on which the selected markings point by point are reproducible. The bar graph display then shows pre chose times and in the form of a growing bar the up ago elapsed playing time, so that in a simple optical manner it can be determined how much time until the markie is reached point remains. This is for disc jockeys, broadcasting speakers and other professional operators of correspond the players of great importance, since they are demented talking about a change of music, a crosstalk by the ausklin music or muffled in the background Can set music.  

According to a further embodiment of the invention selected markings with inputable word or picture information tions can be saved and called up as pairs of values. So as Reminder, for example, the term intro, outro or cutout or other can be chosen to add another Distinguish the selected marking points optically to enable a display of the player.

According to a further embodiment of the invention, the Spei cher releasably connected to the player, preferably as Data carriers, such as a memory card or a storage diskette, optionally in a recording on the player can be placed or inserted. With this everyone can Operator of the player his individually entered Save data and after using the player the Remove the storage unit. The next user then puts his own storage unit.

Basically, so-called Beat counter, namely known clock frequency counter, the preferred are provided in the player according to the invention. The clock frequency counter is preceded by a push button input direction to operate. Operates the operator of the Player in time with this button, determines an existing one Electronics the clock frequency, which may then be on a display is shown.

According to a further embodiment of the present invention the player has a speed controller Change in playback speed, which is basically as so-called pitch is known in the prior art. By Turning an appropriate pitch control can reproduce the sound speed or frequency accelerated, decelerated or can be changed to another value. Possibly. can by Aus use the so-called pitch bend function depending on the duration of the The set playback speed increases or be lowered.  

According to a particular embodiment of the invention Clock frequency counter and the speed controller with one Frequency adjuster connected, which according to the Drehge change in speed the thereby changed clock frequency determined. Preferably, the entered or changed Clock frequencies shown on a display device, esp especially in the bar chart display already mentioned.

The clock frequency changes (BPM changes) that result from the use of the pitch or pitch bend function, who which is shown in the display but not saved. The BPM Values should always be set to zero when the pitch control is set. H. at the nominal speed of the CD player, determined and abge be saved. So when changing the running speed pitch, the exact current BPM value is always calculated will.

The clock frequency of a piece is at nominal speed determined. If. Use the pitch controls later det, so the playback speed and changes hereby also the clock frequency and pitch of the piece. The Current clock frequency is from the stored nominal clock frequency and the position of the pitch controller. This The current clock frequency is then shown on the display as a BPM value shows. The operator can use this display to determine the pitch Adjust the controller so that both pieces have the same beat frequency running. Will now run one piece at a time started the piece, the two pieces run synchronously. Of the The volume of the first can operate on a sound mixer Lower one piece and increase that of the second piece by one to achieve the most inconspicuous transition. Alternatively can the device according to the invention be used so that at Reaching a predetermined point or a piece end playback stopped and a second device at the same time, that was previously in pause mode is started. With the This autostart function can be used to switch from one  Realize piece to next without user intervention. The playback speed and thus also the playback frequency can be adjusted manually by the user zer done.

The function "End of Track "gives the possibility to run parallel to the saved intermediate points during a piece of music and the BPM function to save information about the end of the piece. Here at the user can choose one of the three options Use "Hide", "End" or "Cut" as Abbreviations are shown in the display and set manually the.

In a practically realizable embodiment, on the permanently installed or detachable read / write device marking or markings as mixpoints with the so-called frames (storage units for the sound information tion) saved as pairs of values, e.g. B. "Frame No. 25324 - Cut in Point "or" Track 4.3 min, 24 sec, Frame 16 - Cut in Point ", is saved. The RAM thus stores the number or Position of the frame defined as a mixpoint and the selected one Name and any other information, each stored value by means of the state of the art in principle nik well-known read heads using a "go to" function can be controlled. The bar graph display in the the so-called graphic display then serves to orient the User how far he can find existing markings in the Graphic display are visible when approaching the CD Has.

An embodiment of the invention is in the drawings shown. Show it

Fig. 1 is a front view of a CD player

Fig. 2 is an enlarged view of the graphic displays of this CD player and

Fig. 3 is a flow chart "Mixpoint programming".

CD players are generally known in the prior art. The present description is therefore limited to the parts required in connection with the invention. The CD player has a CD compartment 10 , in which one or more CD's can be inserted depending on the equipment. In addition, a slot 11 for a memory card can be provided, on which the user has individually saved his personal data. The display device consists of a graphic display 12 , which is explained in more detail below with reference to FIG. 2. Other operating elements are the "Go to" button 13 for activating the selection mixpoint and the input button 14 for the frequency counter (BPM).

As can be seen from FIG. 2, the graphic display 12 shows several details. A first field 15 gives an indication of the "track" number of the currently running track. The field below indicates how the next mixpoint should be used; in the present case this is a "cut out" notice for the operator. She saved this note even when preselecting the Mixpoint. Field 17 indicates that an auto start (of a second CD player) should take place when the "cut out" time is reached. Field 18 specifies the current clock frequency (BPM number) of the piece of music and field 19 the position of the playback speed controller, the pitch controller, which is specified in deviation from the normal speed. Field 20 contains another symbol, here "c", from which it can be seen that the track in question, ie the piece of music, does not end, but ends as a cut (abruptly). The playing time is shown in field 21 . Using the bar graph display 22 , the user can diagnose the position of the read head with reference to the total playing length of the piece, as indicated by the angle 23 , as well as the various mix points 24 selected by her, whereby the currently selected mix point 25 receives a distinctive identifier. The operation of the Darge presented CD player is shown in Fig. 3. After inserting each CD disc and given start command, it is checked whether the signature on the CD is registered in RAM, ie the signature is read. In the internal memory or on the memory card connected to the internal memory, for example, registered mixpoints etc. are read and compared. If the signature is not known, a memory command can be entered, which is then registered under the next free memory address. Any new data, such as the selection of new mixpoints can be added, and others may be deleted. Displayed data signal the user that the storage has been carried out. In the case of already known signatures, the data already contained in the memory are searched for and displayed and then optionally confirmed and / or replaced by new data which are also displayed. As the flowchart shows, it is up to the user which data he or she does not store.

Claims (10)

1. Compact disc (CD) player with a reading device for detecting information stored on the CD with a read-write memory for recording the externally entered playback characteristics and a display device for the current duration of the already recorded sound, characterized by a the read-write memory connected input device for optional marking of discrete points in time in the area of a coherent sound recording, the optional markings for influencing the partial playing time of the sound carrier being available when this sound carrier is played repeatedly. 2. CD player according to claim 1, characterized in that that the display device for the current period of time additionally the remaining term to the next or the selected markings. 3. CD player according to claim 1 or 2, characterized records that the display device is a bar graph display is on which the selected markings point by point are reproducible. 4. CD player according to one of claims 1 to 3, characterized characterized that the selected markings with insert available word and / or image information as pairs of values can be given, stored and called up. 5. CD player according to one of claims 1 to 4, characterized characterized in that the memory is a detachable with the Playback connected data carrier, especially one Memory card or diskette.   6. CD player according to one of claims 1 to 5, characterized characterized in that a clock frequency counter is provided, the clock frequencies via a pushbutton input device zen can be entered. 7. CD player according to claim 6, characterized in that that a speed controller to change the Playback speed is provided, the Taktfre sequence counter and the speed controller with one Frequency adjusters are connected, which corresponds to the Rotation speed change the hereby changed Clock frequency determined. 8. CD player according to one of claims 6 or 7, characterized characterized in that the entered or changed clock frequencies can be displayed on a display device, preferably in the bar graph display. 9. CD player according to one of claims 1 to 8, characterized characterized in that two drives or a connector for pre-connected to another CD player hen that is after or shortly before reaching a marking can be started. 10. CD player according to claim 9, characterized in that the sound reproduction of two interconnected Players or drives can be synchronized.