JP2654534B2 - Recording / playback data processing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording / reproducing data processing apparatus applied to an optical disk apparatus capable of recording and reproducing recording data on both sides of an optical disk capable of recording data on both sides, and more particularly to processing image and audio data for one frame. The present invention relates to a recording / reproducing data processing device which distributes and records data on one round of the front and back surfaces of an optical disc, and generates and replaces interpolation data when an error is detected in reproduced data during reproduction.

[0002]

2. Description of the Related Art FIG. 5 is a block diagram showing an example of a conventional recording / reproducing data processing device.

Here, an optical disk device 100 connected to a recording / reproducing data processing device has an optical head (not shown) on the front side and the back side of an optical disk 101 capable of recording on both sides.
The front surface recording data D41 and the back surface recording data D42 are simultaneously recorded, respectively, and at the time of reproduction, they are simultaneously read from the front surface and the rear surface of the optical disk 101, respectively, and output as reproduction data D51 and D52.
Further, the optical head on the front side is configured to move from the outer circumference of the optical disc to the inner circumference, and the optical head on the back side is configured to simultaneously move from the inner circumference to the outer circumference of the optical disc. The front and back recording data D41 and D42 are generated so that the total bit rate of the recording data supplied to the two optical heads of the optical disc apparatus 100 is always constant. Record control information and the like.

[0004] First, a process of generating print data will be described.

[0005] The input image signal Sv1 and audio signal S
a1 is quantized by the A / D converters 1 and 2 respectively, sent out as image data Dv1 and audio data Da1, and stored in the memories 3 and 4 in frame time units. The image data and audio data for one frame stored in the memories 3 and 4 are read out as image data Dv2 and audio data Da2 after being subjected to time axis modulation, timing adjustment, and the like, and input to the data selection unit 5. . In this case, after reading one frame of image data Dv2, one frame of audio data Da2 is read. The image and audio data for one frame read out as described above is sent to the data distribution unit 6 as continuous recording array data D10 by the data selection unit 5. Here, the control unit 24 sets the frame timing signal Sf
, The memories 3 and 4 and the data selector 5 are controlled respectively.

The recording array data D10 is stored in the data distribution unit 6
Thus, the data is distributed to front side recording data D21 recorded on the front side of the optical disc and back side recording data D22 recorded on the back side of the optical disc.
8, the control information Dc is added to the head of each data string, and the surface recording data D31 as shown in FIG.
And the back surface recording data D32 is generated. Here, the control information Dc is, for example, information such as an error correction code, recording surface information of an optical disc, and a type of recording data, and is generated by the control information generation circuit 9. The front surface recording data D31 and the rear surface recording data D32 are converted into recording codes by the modulators 10 and 11, respectively, and are converted into the front surface recording data D41 and the rear surface recording data D42, respectively.
Sent to

By the way, the data distribution unit 6 converts the recording array data D10 into front side recording data D21 and back side recording data D21.
22, the data is distributed according to the peripheral speed ratio of the recording tracks on the front and back surfaces while keeping the total data amount of the image data elements of the recording array data D10 constant. For this reason,
The control unit 24 calculates the amount of data to be recorded on the front and back sides according to the recording track position information Pt, and generates a front and back discrimination signal C1 indicating whether the data element is to be recorded on the front side or the back side. The data is sent to the data distribution unit 6. In this way, the front side recording data and the back side recording data are generated, and one frame of image data, audio data, and control information are recorded on one circumference of both sides of the optical disc.

Next, processing of reproduced data will be described.

The reproduced data D51 and D52 read from the front and back surfaces of the optical disk 101 are subjected to error correction processing and demodulation processing by demodulators 12 and 13, respectively, and input to the selector unit 14. The selector unit 14 extracts control information Dc from the front and back side reproduction data D61 and D62, and outputs the front side reproduction data D61 and the back side reproduction data D62 as one line of reproduction array data D70 based on the control signal Dc.

The data discriminating section 15 generates a data discriminating signal C2 indicating the type of data, that is, image data or audio data, based on the control information Dc, and sends it to the separator section 17. When a code error is detected in the reproduction sequence data sequence D70, the code error detection unit 16 generates a flag Cf indicating the position of the error data and sends it to the interpolation units 18 and 19. The separator 17 separates the reproduction array data D70 into reproduction image data Dv3 and reproduction audio data Da3 according to the data discrimination signal C2, and outputs the data to the interpolation units 18 and 19, respectively.

The interpolating units 18 and 19 generate interpolated data by performing predictive calculation from data adjacent to the error data of the reproduced image data Dv3 and the reproduced audio data Da3 based on the flag Cf indicating the error data position, and generate the error data. Replace with interpolation data. The memories 20 and 21 and the DA converters 22 and 23 receive the reproduced image data and the reproduced audio data, respectively, in which the error data has been subjected to the interpolation processing, and output them as an image signal Sv2 and an audio signal Sa2.

[0012]

Generally, when reproducing data recorded on an optical disk, a burst-like code error in which data is continuously lost occurs due to dust or scratches adhering to the optical disk or mixing of disturbance. . To correct such a code error, interpolation processing is performed by generating prediction data by performing predictive calculation from data surrounding the error data, and replacing the error data with the interpolation data. However, as described above, in the conventional recording / reproducing data processing apparatus, one frame of image data is arranged next to one frame of audio data to generate recording arrangement data, and this recording arrangement data is used as surface recording data. Since the data is distributed to the backside recording data, there is a problem that stable interpolation data cannot be obtained with high reliability from the surrounding data of the error data depending on the frequency of missing reproduction data.

An object of the present invention is to provide a recording / reproducing data processing apparatus capable of improving the accuracy and reliability of interpolation processing without complicating the circuit for code errors in which data loss of reproduced data continues. is there.

[0014]

A recording / reproducing data processing apparatus according to the present invention is a recording / reproducing data processing apparatus applied to an optical disk apparatus capable of recording and reproducing recording data on both sides of an optical disk capable of recording both sides, respectively. A / D conversion means for quantizing an input image signal and audio signal on a frame basis to convert the input image signal and audio signal into image data and audio data, and a first field from one frame of image data output from the A / D conversion means. An image memory means capable of outputting image data of the first and second fields at a predetermined timing, an audio memory means capable of outputting one frame of audio data quantized by the A / D conversion means at a predetermined timing, The image data of the first and second fields output by the image memory means and the audio memory means output by the audio memory means. The audio data for one frame to be received are respectively arranged so that the image data for the first field is followed by the audio data for one frame, and then the image data for the second field. A data selection unit for outputting the data; and a data distribution unit for allocating the recording array data output from the data selection unit to front surface recording data and back surface recording data.

Further, the recording / reproducing data processing apparatus of the present invention is a recording / reproducing data processing apparatus applied to an optical disk apparatus capable of recording and reproducing recording data on both sides of an optical disk capable of recording on both sides, respectively. A / D conversion means for quantizing the signal and the audio signal on a frame basis and converting them into image data and audio data,
An image memory unit capable of outputting image data of a first field and a second field from image data for one frame output by the A / D conversion unit at a predetermined timing, and quantized by the A / D conversion unit. Audio memory means capable of outputting one frame of audio data at a predetermined timing;
Audio data to be output as audio data even samples and audio data odd samples by distributing the audio data for one frame into two according to whether the arrangement order of the audio data elements of the audio data for the frame is an even number or an odd number Distributing means, receiving the image data of the first field and the second field output by the image memory means and the audio data even-numbered sample and the audio data odd-numbered sample output by the audio data distributing means, respectively; Data selection means for arranging the audio data even samples, the image data of the second field, and the audio data odd samples next to the data, and outputting the data as recording array data; The recording array data output by the front side recording data and the back side recording And a data distribution means for distributing to the chromatography data. Optical discs that can record data on both sides are available.
Optical disk drive that can record and play on both sides of the disc
Recording and reproduction data processing apparatus applied to
Video and audio signals in frame units
A-D for converting to child image data and audio data
Conversion means and one frame output by the A / D conversion means
1st field and 2nd field from image data
Image data can be output at predetermined timing.
Image memory means and quantization by the A / D conversion means.
Of one frame of audio data
Voice memory means that can output
The audio data element of the audio data for one frame to be input
Depending on whether the array order is even or odd
The audio data for one frame is divided into two and the audio data
Outputs as several samples and audio data odd samples
Audio data distribution means, and the image memory means
Image data of the first field and the second field
Data and the audio data even number output by the audio data distribution means.
Sample and audio data odd-numbered samples, respectively.
The audio data follows the image data of the first field.
Data odd sample, then the image of the second field
Data, and then the audio data even-numbered samples.
To output as recorded array data
Selecting means, and the recording arrangement outputted by the data selecting means.
Allocate column data to front side recording data and back side recording data
May be provided .

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention, and the same reference numerals are given to the same components as those in the conventional example shown in FIG. Here, the AD converters 1 and 2 quantize the input image signal Sv1 and the audio signal Sa1, respectively, and send them to the memories 31, 32 and 4 as the image data Dv1 and the audio data Da1.

The memory 31 captures and stores the image data of the first field in the image data Dv1 of one frame output from the A / D converter 1 in units of field time.
Further, the memory 32 captures and stores the image data of the second field in the image data Dv1 of one frame in units of field time. Further, the memory 4 stores the audio data Da1 for one frame in frame time units. The image data and the audio data stored in the memory as described above are subjected to time axis modulation, timing adjustment, and the like, and are sequentially read. The data reading order in this case is as follows.
Field image data Dv21, next one frame of audio data Da21, and then second field image data Dv22.

The data selector 51 includes memories 31, 32,
4 are bundled and output as recording array data D11 as shown in FIG. That is, the audio data for one frame is arranged next to the image data of the first field, and then the image data of the second field is arranged. Note that the control unit 25 controls the memories 31, 32, 4
And the data selector 51.

The data distribution unit 6 distributes data according to the peripheral speed ratio of the recording tracks on the front and back surfaces while keeping the total data amount of the image data elements of the recording sequence data D11 constant, as in the conventional example. Data D11 is converted to surface recording data
23 and the back side recording data D24. For this reason,
The control unit 25 calculates the amount of data to be recorded on the front and back sides according to the recording track position information Pt, and generates a front and back discrimination signal C1 indicating whether the data element is to be recorded on the front side or the back side. The data is sent to the data distribution unit 6. Further, the control information adding units 7 and 8 provide the surface recording data D
The control information Dc is added to the head of each data string of the backside recording data 23 and the backside recording data D24 to generate the front side recording data D33 and the backside recording data D34 as shown in FIG.
The modulators 10 and 11 convert the front side recording data D33 and the back side recording data D34 into recording codes, respectively, and send them to the optical disc apparatus 100 as front side recording data D43 and back side recording data D44.

On the other hand, the demodulators 12 and 13 perform error correction and demodulation processing on the reproduced data signals D53 and D54, respectively, when they are read from the front and back surfaces of the optical disk 101, respectively, as in the conventional example, and perform the reproduction of the front surface reproduced data D63 and D63. The data is transmitted to the selector section 14 as backside reproduction data D64. The selector unit 14 extracts control information Dc from the front and back side reproduction data D63 and D64, arranges the front side reproduction data D63 and the back side reproduction data D64 in a line based on the control signal Dc, and outputs them as reproduction array data D71. The data discrimination unit 15 generates a data discrimination signal C <b> 2 indicating the type of data based on the control information Dc, and sends it to the separator unit 17. The code error detection unit 16
When a code error is detected in the reproduction sequence data sequence D71, a flag Cf indicating an error data position is generated, and the interpolation unit 18,
Send to 19. The separator unit 17 separates the reproduced image data Dv3 and the reproduced audio data Da3 from the reproduced array data D71 according to the data discrimination signal C2. When the reproduction image data Dv3 and the reproduction audio data Da3 include a code error, the interpolation units 18 and 19 perform interpolation flag C
After interpolating the error data with the predicted value according to f, the error data is output as the image signal Sv2 and the audio signal Sa2 via the memories 20, 21 and the DA converters 22, 23.

In this manner, one frame of image data is divided into the first field image data and the second field image data, and one frame of audio data is interposed between the first field image data and the second field image data. By arranging and generating the recording array data D11, it is possible to disperse the recording positions of the image data on the optical disk. Therefore, when information loss occurs in a burst during reproduction, the image of the first field and the second field Since the probability of simultaneous occurrence of code errors in data is low, data interpolation processing using high autocorrelation between fields of image data can be executed, and code error data can be easily replaced with reproduction data of the previous field. Becomes For example,
When a code error occurs in the image data of the first field, the probability of occurrence of a code error at the corresponding position of the image data of the second field used for the interpolation processing of the code error data is determined in a frame unit as in the related art. Since the data is lower than when the data is arranged continuously, a highly reliable and stable interpolation process can be performed.

In the first embodiment, the memory 3 for storing the image data of the first and second fields is used.
1 and 32 are provided, however, the timing may be controlled such that one memory capable of storing image data for one frame is used and the image data of the first and second fields are separately read.

FIG. 2 is a block diagram showing another embodiment of the present invention. Here, portions different from those of the first embodiment shown in FIG. 1 are mainly shown, and description of other same portions is omitted.

The memory 31 captures and stores the image data of the first field in the image data Dv1 of one frame output from the A / D converter 1 in units of field time.
The memory 32 captures and stores the image data of the second field in the image data Dv1 of one frame in units of field time. The memory 4 stores the audio data Da1 for one frame in frame time units. The image data and the audio data stored in the memory are subjected to time axis modulation, timing adjustment, and the like, and are sequentially read. In this case, the data reading order is as follows: first, the image data Dv23 of the first field, and then the audio data Da2 for one frame.
2, followed by image data Dv24 of the second field. Up to this point, the operation is the same as in the first embodiment.

The distribution circuit 27 distributes the audio data Da22 read from the memory 4 depending on whether the arrangement order of the data elements is even or odd, and outputs them as audio data odd samples Da23 and audio data even samples Da24, respectively. . Therefore, the control unit 26 generates the distribution control signal C3 and sends it to the distribution circuit 27. Also,
The delay memory 28 gives a delay of one field period to the audio data even sample Da24, and
Send to 2.

The data selection section 52 includes a first field image data Dv23 and a second field image data Dv2.
4, and the audio data odd-numbered sample Da23 and the audio-data even-numbered sample Da24 are respectively received and bundled to generate recording array data D12 as shown in FIG. That is, the audio data is arranged such that the audio data odd sample Da23 follows the first field image data Dv23, the second field image data Dv24 follows, and the audio data even sample Da24 follows. The data distribution unit 6 converts the recording array data D12 into the surface recording data D
121 and back side print data D122.

As described above, by dividing one frame of audio data into even and odd samples, the recording positions of the audio data on the optical disc can be dispersed. Since the probability of occurrence of a code error in even-numbered samples and odd-numbered samples of data can be reduced at the same time, the accuracy and reliability of interpolation processing using an average value of adjacent data for code errors in audio data are improved.

It is apparent that the same effect can be obtained even if the arrangement order of the odd-numbered samples and the even-numbered samples of the audio data is changed. In this case, the delay memory 28 may provide a delay of one field period to the audio data odd-numbered sample Da23 output from the distribution circuit 27.

[0030]

As described above, the recording / reproducing data processing apparatus according to the present invention is capable of recording one frame of image and audio data for recording one frame of image and sound data on one circumference of the front and back surfaces of a double-sided recordable optical disc. When generating backside recording data, one frame of image data is divided into first and second field image data, and one frame of audio data is arranged between the first and second field image data. This makes it possible to disperse the recording positions of the image data on the optical disk, so that when information loss occurs in a burst during reproduction, the probability that the image data in the first field and the second field simultaneously generate a code error is Data interpolation processing using the high auto-correlation between the fields of the image data. It is easy to replace the data in the reproduced data of the previous field, as compared with the case where is arranged the image data in frame units as in the prior art, it is possible to perform stable and reliable interpolation.

Further, by dividing the image data for one frame into the image data of the first and second fields and by arranging the audio data for one frame into even and odd samples according to the order of the data elements. ,
Since the recording positions of the image data and the audio data on the optical disk can be dispersed, when information loss occurs during reproduction, the first and second fields of the image data and even and odd samples of the audio data are simultaneously recorded. The probability of occurrence of code errors can be reduced,
Interpolation of the code error image data with the reproduction data of the previous field becomes easy, and accuracy and reliability of the interpolation process using the average value of the adjacent data with respect to the code error audio data can be improved.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention.

FIG. 2 is a block diagram showing another embodiment of the present invention.

FIG. 3 is a diagram showing a configuration of recording array data D11, front side recording data D33, and back side recording data D34 shown in FIG.

FIG. 4 is a diagram showing a configuration of recording array data D12, front side recording data D121, and back side recording data D122 shown in FIG.

FIG. 5 is a block diagram showing an example of a conventional recording / reproducing data processing device.

FIG. 6 is a diagram showing a configuration of recording array data D10, front side recording data D31, and back side recording data D32 shown in FIG.

[Explanation of symbols]

1, 2 A / D conversion unit 3, 4, 31, 32 memory 5, 51, 52 data selection unit 6 data distribution unit 100 optical disk device 101 optical disk 27 distribution circuit 28 delay memory Dv1, Dv2, Dv21, Dv22, Dv23, Dv
24 image data Da1, Da2, Da21, Da22, Da23, Da
24 audio data D11, D12 recording array data D23, D33, D43, D121 front side recording data D24, D34, D44, D122 back side recording data

Claims (3)

(57) [Claims] 1. A recording / reproducing data processing apparatus applied to an optical disc apparatus capable of recording and reproducing recording data on both sides of an optical disc capable of recording both sides, respectively, wherein an input image signal and an audio signal are quantized in frame units. Conversion means for converting the image data into image data and audio data, and outputting the image data of the first field and the second field from the image data of one frame output by the A / D conversion means at predetermined timings, respectively. Image memory means that can output one frame of audio data quantized by the A / D conversion means at a predetermined timing; and the first and second fields output by the image memory means. Receiving the image data and the one-frame audio data output by the audio memory means, respectively; , The audio data for one frame after the image data of the first field, and then the second
Data selection means for arranging the image data in the field and outputting it as recording arrangement data, and data distribution means for allocating the recording arrangement data output by the data selection means to front side recording data and back side recording data. A recording / reproducing data processing device characterized by the above-mentioned. 2. A recording / reproducing data processing apparatus applied to an optical disk apparatus capable of recording and reproducing recording data on both sides of an optical disk capable of recording on both sides, respectively, wherein an input image signal and an audio signal are quantized in frame units. Conversion means for converting the image data into image data and audio data, and outputting the image data of the first field and the second field from the image data of one frame output by the A / D conversion means at predetermined timings, respectively. Image memory means, audio memory means for outputting one frame of audio data quantized by the A / D conversion means at a predetermined timing, and audio data for one frame outputted by the audio memory means. The audio for one frame is determined according to whether the arrangement order of the audio data elements is even or odd. Audio data distribution means for distributing data into two and outputting as audio data even samples and audio data odd samples; and image data and audio data distribution means for the first and second fields output by the image memory means. The audio data even sample and the audio data odd sample are received, respectively, and the first field image data is followed by the audio data even sample, then the second field image data, and then the audio data odd sample. And data distribution means for distributing the recording sequence data output by the data selection means to front side recording data and back side recording data. Recording and playback data processing device. 3. An optical disk capable of recording both sides of recording data.
Suitable for optical disc devices that can record and reproduce on both sides
Recording / reproducing data processor used for
Image signal and audio signal are quantized in frame units
-To-D conversion that converts the data into image data and audio data
Means for one frame output by the A / D conversion means.
From the image data, the first field and the second field
An image that can output image data at predetermined timing
Image memory means and the A / D conversion means
Output one frame of audio data at a predetermined timing
Voice memory means capable of outputting
Of audio data elements of the audio data for one frame
According to whether the column order is even or odd,
The audio data for the frame is divided into two,
Sound output as sample and audio data odd-numbered samples
Voice data distribution means and before the image memory means outputs
The image data of the first field and the second field
The audio data even number sample output by the audio data distribution means.
Before receiving pull and audio data odd samples respectively
The image data of the first field is followed by the audio data.
Odd-numbered samples, followed by the image data of the second field
Data, then the even sample of the audio data
Select data to be output as recorded array data
Means, and the recording array data output by the data selecting means.
Data is distributed between front side recording data and back side recording data.
Reproducing the data processing apparatus, characterized in that it comprises a minute unit.