JP2002007074A - Recording device and transmission device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To record data outputted from a transmission device such as a set top box by a recording device without fail. SOLUTION: The transmission device 121 demodulates inputted stream data 131 into digital data and outputs it to a digital interface 132. An analog signal obtained by decoding digital data by a decoding means 124 is format-converted by a format conversion means 125 and it is outputted to an analog interface 133. In the recording device 101, a discrimination means 102 discriminates whether inputted digital data can be recorded by the recording device 101 or can be reproduced after recording. When the discrimination means 102 judges that digital data can be recorded, data is recorded in the recording medium 106. When the discrimination means 102 judges that digital data cannot be recorded, the analog signal is encoded in the encoding means 103 and it is recorded in the recording medium 106.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmitting apparatus and a recording apparatus for transmitting and recording digital data such as an MPEG2 transport stream transmitted by broadcasting or communication after receiving the digital data.

[0002]

2. Description of the Related Art Conventionally, when recording video data, audio (audio) data, and other data transmitted by digital broadcasting, as shown in FIG.
1 and the recording device 2002. In FIG. 11, a transmitting device (set-top box) 2001
Receives digitally modulated stream data 2003 via an antenna, a cable, or the like, demodulates the input stream data 2003, and converts the stream data into digital data. Generally, the format of digital data is M
A PEG2 transport stream is used.

[0003] Digital data demodulated by the transmitting apparatus 2001 is input to a recording apparatus 2002 via a digital interface 2004 and recorded. As the digital interface 2004, for example, IEEE
1394 system and the like. As the recording device 2002, a recording device using a D-VHS, a hard disk, or an optical disk as a recording medium is conceivable.

[0004]

However, when recording data transmitted by digital broadcasting using the above-described conventional transmitting apparatus 2001 and recording apparatus 2002, the bit rate of the digital data is not handled by the recording apparatus 2002. In the case where the recording rate is equal to or higher than the maximum rate, the digital data is data in a format that cannot be recorded by the recording device 2002, or the digital data is data in a format that cannot be reproduced after recording in the recording device 2002, etc. Digital data cannot be recorded.

SUMMARY OF THE INVENTION Accordingly, the present invention is to solve the above-mentioned conventional problems, and it is an object of the present invention to provide a recording apparatus capable of recording input digital data without fail, or a method of erroneously recording a part of data that cannot be reproduced after recording. It is an object of the present invention to provide a recording device that does not have any, and a transmitting device that always outputs data that can be recorded by the recording device.

[0006]

According to a first aspect of the present invention, there is provided a recording apparatus which receives first digital data as input and determines whether or not the first digital data is recordable, or is capable of reproducing after recording. Determining means for determining whether or not the first digital data is obtained by decoding the first digital data, and the first digital data cannot be recorded by the determining means or after recording. When it is determined that reproduction is impossible, a format conversion unit for format-converting the first analog signal into a second analog signal, and the first or second analog signal as an input, and the determination unit If it is determined that the first digital data cannot be recorded, a code for encoding the first or second analog signal into second or third digital data Means, together with the first digital data, the second or third digital data as input, if the determination means determines that the first digital data is recordable or reproducible after recording, The first digital data is output, and when it is determined that recording is impossible or reproduction is impossible after recording, switching means for outputting the second or third digital data, and output from the switching means Data recording means for recording digital data on a recording medium.

According to a second aspect of the present invention, in the recording apparatus according to the first aspect, the discriminating means receives the first digital data as an input, and stores the data contained in the first digital data. It is determined whether or not recording is possible for each type, or whether or not reproduction is possible after recording, and the format conversion means receives a first analog signal obtained by decoding the first digital data as an input. ,
For data of a type determined to be unrecordable or unreproducible after recording by the determination unit, the first analog signal is format-converted into a second analog signal, and the encoding unit converts the first or the second analog signal. A second analog signal is input, and for data of a type determined to be unrecordable or unreproducible after recording by the discriminating means, the first or second analog signal is converted to a second or third digital signal. Data extracting means for encoding data into the data, receiving the first digital data as input, and extracting data of a type determined to be recordable or reproducible after recording by the discriminating means as fourth digital data, Or multiplexing means for multiplexing the third digital data with the fourth digital data to generate fifth digital data, Serial data recording means, characterized in that for recording the fifth digital data on a recording medium.

According to a third aspect of the present invention, there is provided a recording apparatus which receives first digital data as input, and determines whether or not the first digital data is recordable.
When the discriminating means determines that the first digital data is not recordable, data conversion means for converting the digital data into recordable second digital data; and the first and second digital data. Data, and outputs the first digital data when it is determined by the determination means that the first digital data is recordable, and outputs the second digital data when it is determined that the first digital data is not recordable. And a data recording means for recording the digital data output from the switching means on a recording medium.

In a recording apparatus according to a fourth aspect of the present invention, in the recording apparatus according to the third aspect, when the bit rate of the first digital data is higher than a predetermined bit rate, It is determined that recording is not possible.

According to a fifth aspect of the present invention, there is provided a recording apparatus which receives first digital data as input, and determines whether or not the first digital data can be reproduced after recording, and the determining means. When it is determined that the first digital data cannot be reproduced after recording, data conversion means for converting the first digital data into second digital data that can be reproduced after recording; and When the second digital data is input and the first digital data is determined to be reproducible by the discriminating means, the first digital data is output. Comprises switching means for outputting the second digital data, and data recording means for recording the digital data output from the switching means on a recording medium. That.

A recording apparatus according to a sixth aspect of the present invention is the recording apparatus according to the fifth aspect, wherein the discriminating means determines that the encoding scheme of the first digital data cannot be decoded by the recording apparatus. In some cases, it is determined that reproduction is impossible after recording.

According to a seventh aspect of the present invention, there is provided a transmission apparatus for inquiring whether or not digital data to be output can be recorded by a recording apparatus at an output destination or whether or not the digital data can be reproduced after recording. Data transmitting means for outputting the digital data when it is determined from the result of the inquiry of the system control means that the digital data is recordable or reproducible after recording by the recording device; and Decoding means for decoding the digital data into a first analog signal when the recording device determines that the digital data is unrecordable or unreproducible after recording from the inquiry result; and The second analog signal is a data format that can be recorded by the recording device or can be reproduced after recording. Format conversion means for converting the digital data into a digital signal, when it is determined from the inquiry result of the system control means that the digital data cannot be recorded or cannot be reproduced after recording in the recording device, the decoding means It is characterized in that the first analog signal or the format conversion means outputs a second analog signal.

[0013] A transmitting apparatus according to claim 8 of the present invention provides a recording apparatus which is an output destination of the first digital data,
A system control unit for inquiring a recordable data format, and when it is determined from the inquiry result of the system control unit that the digital data cannot be recorded by the recording device, the first digital data can be recorded. A data conversion means for converting the data into a second digital data in a data format, and the first and second digital data as inputs, and the first digital data is recorded by the recording device based on an inquiry result of the system control means. When it is determined that it is possible, the first digital data is output, and when it is determined that the digital data cannot be recorded by the recording device from the result of the inquiry of the system control unit, Data transmitting means for outputting the second digital data.

According to a ninth aspect of the present invention, in the transmission apparatus according to the eighth aspect, the inquiry by the system control means is an inquiry about a bit rate of the digital data or an image data of the digital data. Inquiry about the format of.

According to a tenth aspect of the present invention, there is provided a transmitting apparatus for inquiring a recording apparatus as an output destination of the first digital data about a data format that can be reproduced after recording, and Data that converts the first digital data into second digital data that is a data format that can be reproduced after recording when it is determined from the inquiry result that the digital data cannot be reproduced after recording by the recording device. Converting means, the first and second digital data as input, and when it is determined from the inquiry result of the system control means that the first digital data can be reproduced after recording by the recording device, Outputting first digital data, and from the inquiry result of the system control means, When the digital data is judged to be unreproducible after recording, characterized in that it comprises a data transmitting means for outputting said second digital data.

According to an eleventh aspect of the present invention, in the transmission apparatus according to the tenth aspect, the inquiry by the system control means is an inquiry about a bit rate of the digital data or an image data of the digital data. Inquiry about the format of.

According to a twelfth aspect of the present invention, there is provided a recording apparatus which receives digital data as input, determines whether or not the digital data can be recorded, and records the digital data with the data inspecting means. When it is determined that the digital data is not recorded on the recording medium, and when the data inspection means determines that the digital data cannot be recorded, the recording of the digital data on the recording medium is stopped. Data recording means.

According to a thirteenth aspect of the present invention, there is provided a recording apparatus, comprising: a demodulating means for demodulating digitally modulated stream data into first digital data; Discriminating means for judging whether or not the first digital data can be recorded; and when the discriminating means judges that the first digital data is not recordable, a second data format which can record the digital data. Data conversion means for converting the first digital data into digital data; and the first digital data when the discrimination means determines that the first digital data can be recorded. Switching means for outputting data and outputting the second digital data when it is determined that recording is not possible; Characterized in that it comprises a data recording means for recording the digital data.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. (Embodiment 1) Embodiment 1 of the present invention will be described with reference to FIG. FIG. 1 shows a recording apparatus 101 having a discriminating unit 102, an encoding unit 103, a switching unit 104, a data recording unit 105, a recording medium 106, and a data receiving unit 107, a demodulating unit 122, and a data transmitting unit 12.
3. Decoding means 124 and format conversion means 1
25 is a block diagram showing a connection state with a transmission device 121 having a communication device 25. FIG.

The transmitting device 121 inputs the digitally modulated stream data 131 via an antenna or a cable or the like, and demodulates the input stream data 131 by a demodulation means 122 to convert the stream data into digital data. Generally, an MPEG2 transport stream is used as the format of digital data. The digital data is transmitted by a data transmitting means 123 and a decoding means 124.
Is input to The data transmitting means 123 converts the input digital data into a data format corresponding to the digital interface 132 and outputs the data to the digital interface 132. Digital interface 1
32 includes, for example, IEEE1394.

The digital data input to the decoding means 124 is subjected to a decoding process to become a decoded signal, that is, an analog signal. For example, if the digital data includes video data and audio data, the decoding means 124 outputs a video signal and an audio signal. The output decoded signal is input to the format conversion unit 125.

The format conversion means 125 converts the format of the input decoded signal. Here, a case where the format of the video signal is converted will be described. For example, when the video signal input to the format converter 125 is a high-resolution video signal, the format converter 125 converts this video signal into a low-resolution video signal and outputs it. The decoded signal subjected to the format conversion by the format conversion unit 125 is output to the analog interface 133.

The recording apparatus 101 receives digital data from the transmitting apparatus 121 via the digital interface 132 and receives a decoded signal subjected to format conversion via the analog interface 133. After the digital data is received by the data receiving means 107 and returned to the original data format, the discriminating means 102 and the switching means 10
4 is input.

The determination means 102 determines whether or not the input digital data is data that can be recorded on the recording medium 106 or data that can be reproduced after recording on the recording medium 106. For example, if the bit rate of the digital data is equal to or higher than the maximum recordable rate of the recording medium 106, it is determined that recording is not possible.

The case where the decoding means (not shown) built in the recording device 101 cannot decode the digital data corresponds to the case where the digital data cannot be reproduced after recording. The case where the decoding means cannot decode the digital data means that the decoding means supports only the decoding of the low-resolution video signal but the digital data is a high-resolution video signal, or that the decoding means cannot decode the digital data. Is compatible only with decoding of audio signals in the AC-3 format, but the audio data contained in the digital data is in the MPEG format.

The result of the determination by the determination means 102 is output to the encoding means 103 and the switching means 104. The encoding means 103, when it is determined by the determination means 102 that the digital data can be recorded or can be reproduced after recording,
Nothing works. If the determination unit 102 determines that digital data cannot be recorded or cannot be reproduced after recording, the video signal or audio signal, which is a decoded signal input from the analog interface 133, is encoded and encoded as encoded data. Output.

For example, although the decoding means supports only the decoding of a low-resolution video signal, the digital data is a high-resolution video signal. In the case, the transmitting device 12
1 to encode the low-resolution video signal and output encoded data.

Although the decoding means supports only the decoding of the audio signal in the AC-3 format, the audio signal included in the digital data is in the MPEG format. If it is determined that the data cannot be reproduced, the analog audio signal input from the transmission device 121 is encoded by the MPEG method and the encoded data is output.

The switching means 104 outputs the digital data input from the data receiving means 107 when the determination means 102 determines that the digital data is recordable or reproducible after recording. If the determination means 102 determines that the digital data cannot be recorded or cannot be reproduced after the recording, the encoded data input from the encoding means 103 is output.

The data recording means 105 includes a switching means 104
Performs signal processing required for recording on the recording medium 106 on the data output from. For example, the recording medium 10
If the optical disk 6 is an optical disk, processing such as addition and modulation of ECC is performed. Then, the data subjected to the signal processing is recorded on the recording medium 106.

As described above, the recording apparatus according to the first embodiment has the digital interface 132 and the analog interface 133, and the digital data input from the digital interface 132 cannot be recorded on the recording medium 106 or is not recorded. If the data cannot be reproduced later, the analog interface 132
Encodes the analog signal inputted from the interface, converts it into encoded data and records it,
If the digital data input from is data recordable or reproducible after recording, the digital data is recorded as it is.

According to the recording apparatus of the first embodiment, even when digital data input from the digital interface cannot be recorded, the analog signal input from the analog interface is encoded and recorded. By doing so, the data output from the transmitting device can always be recorded. For example, the digital data includes data obtained by encoding a high-resolution video signal,
If the analog signal includes a low-resolution video signal generated by converting the resolution of the high-resolution video signal, even if the recording device can not record digital data including high-resolution video data, Data of a low-resolution video signal can be recorded. Further, even if digital data input from the digital interface cannot be reproduced after recording, the analog signal input from the analog interface is encoded and recorded. It can be recorded in a reproducible format.

In the first embodiment, an example has been described in which the format conversion means 125 converts a high-resolution video signal into a low-resolution video signal. However, this may be another format conversion.

In the first embodiment, the case where the high-resolution video signal is converted into the low-resolution video signal by the format conversion unit 125 has been described.
If the high-resolution video signal can be coded at 03, the format conversion means 125 may output the high-resolution video signal without conversion.

Further, in the first embodiment, the case where the determination means 102 determines that the digital data cannot be recorded is the case where the bit rate of the digital data is equal to or higher than the maximum recordable rate of the recording medium 106. As described above, the determination unit 102 determines that digital data cannot be recorded, for example, even when digital data is prohibited from being copied by copy guard processing.

In the first embodiment, when the determination means 102 determines that digital data cannot be reproduced after recording, the decoding means incorporated in the recording apparatus only performs decoding of the low-resolution video signal. If the digital data is a high-resolution video signal and the decoding means only supports decoding of AC-3 format audio signals, the audio signal of the digital data is MPEG Although the case of the format has been described, the determination unit 102 determines that the decoding unit is NT
When only the decoding of digital data whose video is encoded by the SC system is supported, but the digital data is data whose video is encoded by the PAL system,
Even if the decoding means only supports the decoding of digital data encoded by the MPEG2 encoding method, the digital data is recorded even when the digital data is encoded by the MPEG4 encoding method. It is later determined that reproduction is impossible.

(Embodiment 2) Embodiment 2 of the present invention will be described with reference to FIG. FIG.
2. Recording device 20 having encoding means 203, switching means 204, data recording means 205, recording medium 206, data receiving means 207, and format conversion means 225
FIG. 2 is a block diagram showing a connection state between a transmitting device 221 having a demodulating unit 222, a data transmitting unit 223, and a decoding unit 224.

The transmitting device 221 inputs the digitally modulated stream data 231 via an antenna, a cable, or the like, and demodulates the input stream data 231 by the demodulation means 222 to convert the stream data into digital data. The digital data is input to the data transmitting means 223 and the decoding means 224. The data transmission unit 223 converts the input digital data into a data format corresponding to the digital interface 232 and outputs the data to the digital interface 232. Decoding means 22
The digital data input to 4 is subjected to a decoding process to become a decoded signal, that is, an analog signal. The decoded signal is output to the analog interface 233.

The recording device 201 receives digital data from the transmitting device 221 via the digital interface 232 and receives a decoded signal via the analog interface 233. After the digital data is received by the data receiving means 207 and returned to the original data format, it is input to the discriminating means 202 and the switching means 204.

The determining means 202 determines whether the input digital data is data that can be recorded on the recording medium 206 or whether it is data that can be reproduced after recording on the recording medium 206.

For example, when the bit rate of digital data is equal to or higher than the maximum recordable rate of the recording medium, it is determined that recording is not possible.

The case where the decoding means (not shown) built in the recording device 201 cannot decode the digital data corresponds to the case where the digital data cannot be reproduced after the recording. The case where the decoding means cannot decode the digital data means that the decoding means supports only the decoding of the low-resolution video signal but the digital data is a high-resolution video signal, or that the decoding means cannot decode the digital data. Is compatible only with decoding of audio signals in the AC-3 format, but the audio data contained in the digital data is in the MPEG format.

The result of the judgment by the judging means 202 is sent to the encoding means 203, the switching means 204, the format converting means 22
5 is output. The format converter 225 receives the decoded signal from the analog interface 233. Format conversion means 225 and encoding means 203
No operation is performed when the determination means 202 determines that digital data can be recorded or can be reproduced after recording.

If the determination means 202 determines that the digital data cannot be recorded or cannot be reproduced after recording, the format conversion means 225 converts the received decoded signal into a format recordable on the recording medium 206. . For example, when the input decoded signal is a high-resolution video signal, the format conversion unit 225 converts the video signal into a low-resolution video signal. The converted decoded signal is input to the encoding means 203. Encoding means 20
3 encodes the input decoded signal and outputs it to the switching means 204 as encoded data.

The switching means 204 outputs the digital data input from the data receiving means 207 when the determination means 202 determines that the digital data is recordable or reproducible after recording. If the determination means 202 determines that digital data cannot be recorded or cannot be reproduced after recording, the encoded data input from the encoding means 203 is output.

The data recording means 205 includes a switching means 204
Performs signal processing necessary for recording on the recording medium 206, and records the data output from the recording medium 206.

As described above, the recording apparatus according to the second embodiment has the digital interface 232 and the analog interface 233, and the digital data input from the digital interface 232 cannot or cannot be recorded on the recording medium 206. If the data cannot be reproduced later, the analog interface 233
After converting the format of the analog signal input from, the data is encoded and converted into encoded data and recorded. If the digital data input from the digital interface 232 is data that can be recorded or reproduced after recording, Digital data is recorded as it is.

Therefore, according to the recording apparatus of the second embodiment, even if digital data input from the digital interface cannot be recorded, a format capable of recording an analog signal input from the analog interface can be used. Then, by encoding and recording, the data output from the transmitting device can always be recorded. Further, even if digital data input from the digital interface cannot be reproduced after being recorded on the recording medium, the analog signal input from the analog interface is format-converted, encoded and recorded. The recorded data can always be recorded in a format that can be reproduced after recording.

In the second embodiment, the case in which the bit rate of the digital data is equal to or higher than the maximum recordable rate of the recording medium 206 is considered as a case where the determination means 202 determines that the digital data cannot be recorded. As described above, the determining unit 202 determines that digital data cannot be recorded, for example, even when digital data is prohibited from being copied by copy guard processing.

In the second embodiment, when the determination means 202 determines that digital data cannot be reproduced after being recorded, the decoding means incorporated in the recording device 201 performs only decoding of low-resolution video signals. When the digital data is a high-resolution video signal, or when the decoding means only supports decoding of the AC-3 format audio signal, the digital data audio signal Although the case of the MPEG format has been described, the determining unit 202 determines that the decoding unit is N
It supports only decoding of digital data whose video is encoded by the TSC system, but the digital data is data of which the video is encoded by the PAL system. If the digital data is only encoded by the MPEG4 encoding method and the digital data is encoded by the MPEG4 encoding method, it is determined that the digital data cannot be reproduced after recording. I do.

(Embodiment 3) Embodiment 3 of the present invention will be described with reference to FIG. FIG.
2, encoding means 303, multiplexing means 304, data recording means 305, recording medium 306, data receiving means 307,
Recording apparatus 301 having data and data extracting means 308
FIG. 3 is a block diagram showing a connection state between a demodulation unit 322, a data transmission unit 323, a decoding unit 324, and a transmission device 321 having a format conversion unit 325.

The transmitting apparatus 321 inputs the digitally modulated stream data 331 via an antenna or a cable or the like, and demodulates the input stream data 331 by the demodulation means 322 to convert the stream data 331 into digital data. The digital data is input to the data transmission unit 323 and the decoding unit 324. The data transmission unit 323 converts the input digital data into a data format corresponding to the digital interface 332 and outputs the data to the digital interface 332. Decoding means 32
The digital data input to 4 is subjected to a decoding process to become a decoded signal, that is, an analog signal. The decoded signal is input to the format conversion unit 325 and subjected to format conversion.
3 is output.

The recording device 301 receives digital data from the transmitting device 321 via the digital interface 332 and receives a decoded signal via the analog interface 333. After the digital data is received by the data receiving means 307 and returned to the original data format, it is input to the discriminating means 302 and the data extracting means 308.

In the discriminating means 302, the recording device 30 is provided for each type of data contained in the input digital data.
1 to determine whether the data is recordable, or the recording medium 3
In step 06, it is determined whether or not the data can be reproduced after recording. Assuming that the digital data includes video data and audio data, the determination means 302 makes a determination on each of the video data and audio data.
For example, if the bit rate of the digital data is equal to or higher than the maximum recordable rate of the recording medium 306, it is determined that recording is not possible.

The case where the decoding means (not shown) incorporated in the recording device 301 cannot decode the digital data corresponds to the case where the digital data cannot be reproduced after recording. The case where the decoding means cannot decode the digital data means that the decoding means supports only the decoding of the low-resolution video signal but the digital data is a high-resolution video signal, or that the decoding means cannot decode the digital data. Is compatible only with decoding of audio signals in the AC-3 format, but the audio data contained in the digital data is in the MPEG format.

The result of the determination by the determining means 302 is output to the encoding means 303, the multiplexing means 304 and the data extracting means 308.

Hereinafter, a case will be described in which the determination means 302 determines that video data cannot be recorded or cannot be reproduced after recording, and audio data can be recorded or can be reproduced after recording. In this case, since it is determined that the video data cannot be recorded or cannot be reproduced after recording, the encoding means 303 sets the analog interface 33
The video signal is encoded from among the decoded signals input from 3 and output to the multiplexing means 304 as encoded data.

The data extracting means 308 extracts audio data determined to be recordable or reproducible after recording by the discriminating means 302 from the digital data input from the data receiving means 307, and outputs the extracted audio data.

The multiplexing means 304 includes a data extracting means 30
8 and the coded data of the video signal input from the coding means 303 and multiplex and output. The data recording unit 305 performs signal processing and the like necessary for recording on the recording medium 306 on the data output from the multiplexing unit 304, and records the data on the recording medium 306.

As described above, the recording apparatus according to the third embodiment has the digital interface 332 and the analog interface 333. The digital data input from the digital interface 332 can be recorded on the recording medium 306 or reproduced after recording. Extract only possible data. Then, of the data included in the digital data, for data that cannot be recorded on the recording medium 306 or cannot be reproduced after recording, the analog signal input from the analog interface 333 is encoded and converted into encoded data. Then, the data extracted from the digital data and the data obtained by encoding the analog signal are multiplexed and recorded on the recording medium 306.

Therefore, according to the recording apparatus of the third embodiment, even if digital data input from the digital interface cannot be recorded, the analog signal input from the analog interface is encoded and recorded. By doing so, the data output from the transmitting device can always be recorded. At this time, since the recordable data is extracted from the digital data and recorded, it is possible to prevent the data quality from deteriorating due to extra re-encoding.

Even if digital data input from the digital interface cannot be reproduced after recording, the analog signal input from the analog interface is recorded, so that the data output from the transmitting device must be recorded after recording. It can be recorded in a reproducible format. Also at this time, data that can be reproduced after recording is taken out from digital data and recorded, so that it is possible to prevent data quality degradation due to extra re-encoding.

In the third embodiment, a case has been described where digital data includes video data and audio data. However, this may be a combination of other data, and may be a combination of a plurality of different video data. It may be a combination, a combination of video data and auxiliary data, or a combination of audio data and auxiliary data.

In the third embodiment, the case where the determination means 302 determines that the digital data cannot be recorded is the case where the bit rate of the digital data is higher than the maximum recordable rate of the recording medium 306. As described above, the determining unit 302 determines that digital data cannot be recorded, for example, even when digital data is prohibited from being copied by copy guard processing.

In the third embodiment, when the determining means 302 determines that the digital data cannot be reproduced after recording, the decoding means incorporated in the recording device 301 only performs decoding of the low-resolution video signal. When the digital data is a high-resolution video signal, or when the decoding means only supports decoding of the AC-3 format audio signal, the digital data audio signal Although the case of the MPEG format has been described, the determining unit 302 determines that the decoding unit is N
It supports only decoding of digital data whose video is encoded by the TSC system, but the digital data is data of which the video is encoded by the PAL system. If the digital data is only encoded by the MPEG4 encoding method and the digital data is encoded by the MPEG4 encoding method, it is determined that the digital data cannot be reproduced after recording. I do.

Further, in the third embodiment, the format conversion means 325 is provided in the transmitting device 301, but may be provided in the recording device 301 as shown in FIG. In that case, the format conversion means 325
If the digital data input by the determination means 302 is determined to be unrecordable or unreproducible after recording,
The decoded signal received via the analog interface 333 is converted into a format recordable on the recording medium 306.

(Embodiment 4) Embodiment 4 of the present invention will be described with reference to FIG. FIG.
2, a recording device 501 having a data conversion unit 503, a switching unit 504, a data recording unit 505, and a recording medium 506, a demodulation unit 522, and a data transmission unit 52
3 is a block diagram illustrating a connection state with a transmission device 521 having a communication device 3;

The transmitting device 521 inputs the digitally modulated stream data 531 via an antenna or a cable or the like, and demodulates the input stream data 531 by the demodulation means 522 to convert it into digital data. The digital data is input to the data transmission means 523.
The data transmitting unit 523 converts the input digital data into a data format corresponding to the digital interface 532 and outputs the data to the digital interface 532.

The recording device 501 receives digital data from the transmission device 521 via the digital interface 532. Digital data is received by data receiving means 5
07 and converted back to the original data format digital data, the discriminating means 502, the data converting means 503,
It is input to the switching means 504.

The determination means 502 determines whether the input digital data is data that can be recorded on the recording medium 506, or whether there is data that can be reproduced after recording on the recording medium 506. For example, if the bit rate of the digital data is equal to or higher than the maximum recordable rate of the recording medium 506, it is determined that recording is not possible.

The case where the decoding means (not shown) built in the recording device 501 cannot decode the digital data corresponds to the case where the digital data cannot be reproduced after recording. The case where the decoding means cannot decode the digital data means that the decoding means supports only the decoding of the low-resolution video signal but the digital data is a high-resolution video signal, or that the decoding means cannot decode the digital data. Is compatible only with decoding of audio signals in the AC-3 format, but the audio signal included in the digital data is in the MPEG format.

The result of the judgment by the judgment means 502 is output to the data conversion means 503 and the switching means 504. The data conversion unit 503 does not operate when the determination unit 502 determines that digital data can be recorded or can be reproduced after recording. If the determination unit 502 determines that digital data cannot be recorded or cannot be reproduced after recording, the data format of the input digital data is converted.

For example, when it is determined that recording is impossible due to a high bit rate of digital data, conversion is performed to reduce the bit rate. As a method of reducing the bit rate, there are conceivable methods such as re-encoding digital data after decoding, performing data format conversion on the digital data, and deleting padding data included in the digital data. The digital data converted in this way is output to the switching means 504.

When the determination means 502 determines that digital data can be recorded or can be reproduced after recording, the switching means 504 outputs the digital data input from the digital interface 532 as it is. If the determination unit 502 determines that digital data cannot be recorded or cannot be reproduced after recording, the data input from the data conversion unit 503 is output.

The data recording unit 505 includes a switching unit 504
And performs signal processing required for recording on the recording medium 506. Then, the data subjected to the signal processing is recorded on the recording medium 506.

As described above, the recording apparatus according to the fourth embodiment has the digital interface 532, and if the digital data input from the digital interface 532 is data that cannot be recorded on the recording medium 506, the recording is performed. The data is converted into recordable data and recorded. If the data cannot be reproduced after recording, the data is converted into data that can be reproduced after recording and recorded. If the digital data input from the digital interface 532 is data that can be recorded or reproduced after recording,
Digital data is recorded as it is.

Therefore, according to the recording apparatus of the fourth embodiment, even if digital data input from the digital interface cannot be recorded, the digital data is converted into recordable data, so that the data can be transmitted from the transmitting apparatus. The output data can always be recorded. For example, when the bit rate of the digital data is higher than the recordable rate, the digital data can be converted and recorded so as to be lower than the recordable rate. Also, even if digital data input from the digital interface cannot be reproduced after recording, the data output from the transmitting device is always converted to data that can be reproduced after recording by converting the data into data that can be reproduced after recording. Can be recorded.

Further, in the fourth embodiment, the case where the bit rate of the digital data is equal to or higher than the maximum recordable rate of the recording medium 506 is considered as a case where the determination means 502 determines that the digital data cannot be recorded. As described above, the determination unit 502 determines that digital data cannot be recorded, for example, even when digital data is prohibited from being copied by copy guard processing.

In the fourth embodiment, when the determining means 502 determines that the digital data cannot be reproduced after recording, the decoding means incorporated in the recording device 501 is used only for decoding the low-resolution video signal. When the digital data is a high-resolution video signal, or when the decoding means only supports decoding of the AC-3 format audio signal, the digital data audio signal Although the case of the MPEG format has been described, the determining unit 502 determines that the decoding unit is N
When only digital data whose video is encoded by the TSC system is decoded, the digital data is data obtained by encoding the video by the PAL system,
Although the decoding means supports only the decoding of digital data encoded by the MPEG2 encoding method, the digital data may be data encoded by the MPEG4 encoding method. Is determined to be unreproducible after recording.

In the fourth embodiment, when the judging means 502 judges that recording is not possible due to the high bit rate of digital data, the data converting means 503 reduces the bit rate. A method has been described in which data is decoded and then re-encoded, data format conversion is performed on digital data, and padding data included in digital data is deleted. However, other methods may be used.

(Embodiment 5) Embodiment 5 of the present invention will be described with reference to FIG. FIG. 6 shows the encoding means 60
3, a recording device 601 having a switching unit 604, a data recording unit 605, a recording medium 606, a data transmitting / receiving unit 607, and a system control unit 608;
2. Data transmission means 623, decoding means 624, format conversion means 625, and system control means 626
FIG. 13 is a block diagram illustrating a connection state with a transmission device 621 having a.

The transmitting device 621 inputs the digitally modulated stream data 631 via an antenna or a cable or the like, and demodulates the input stream data 631 by the demodulation means 622 to convert it into digital data. The digital data is input to the data transmitting / receiving means 623 and the decoding means 624.

The system control means 626 controls the recording device 60
1 is inquired as to whether the digital data obtained by the demodulation means 622 is recordable data, or whether it is data that can be reproduced after recording. In addition, it inquires about the format and bit rate of data that can be recorded by the recording device 601 or can be reproduced after recording.
The contents to be inquired include, for example, the maximum bit rate that can be recorded by the recording device 601 or can be reproduced after recording, and the signal format that can be recorded or reproduced after recording.

The above inquiry is made via the data transmission / reception means 623. The contents of the inquiry are received by the data transmission / reception unit 607 of the recording device 601 and sent to the system control unit 608. System control means 608
Then, a response to the inquiry from the system control unit 626 is transmitted to the system control unit 626 via the data transmission / reception units 607 and 623.

For example, assuming that the content of the inquiry from the transmission device 621 is a content inquiring about the maximum bit rate that can be recorded by the recording device 601 or can be reproduced after recording, the system control unit 608 determines that the recording device 601
Of the maximum recordable bit rate or the maximum reproducible bit rate in the system controller 626 via the data transmission / reception means 607 and 623.

If the content of the inquiry from the transmitting device 621 is a content asking whether the recording device 601 can record digital data of a certain bit rate or whether it can be reproduced after recording, the system control The means 608 sends a reply to the system control means 626 via the data transmission / reception means 607 and 623 as to whether or not the recording device 601 can record the digital data at the bit rate or whether or not the digital data can be reproduced after the recording. Further, when the system control means 608 determines that the digital data cannot be recorded or cannot be reproduced after recording, the system control means 608 replies to the system control means 626 with a recordable or post-recording reproducible bit rate.

If the content of the inquiry from the transmission device 621 is to inquire whether the recording device 601 can record digital data of a certain signal format or whether it can be reproduced after recording, the system control The means 608 determines whether or not the recording device 601 can record digital data of the signal format or whether or not the recording apparatus 601 can reproduce the digital data after recording.
3 to the system control means 626. Also,
If the system control unit 608 determines that the digital data cannot be recorded or cannot be reproduced after recording, the system control unit 608 returns a signal format that can be recorded or reproduced after recording to the system control unit 626.

The system control means 626 controls the recording device 60
If it is determined from the response from 1 that the digital data demodulated by the demodulating unit 622 can be recorded by the recording device 601 or can be reproduced after recording, the data transmitting unit 623
Is controlled to output digital data.
The data transmission unit 623 converts the input digital data into a data format corresponding to the digital interface 632 and outputs the data to the digital interface 632.

If the system control means 626 determines from the response from the recording device 601 that the digital data demodulated by the demodulation means 622 cannot be recorded by the recording device 601 or cannot be reproduced after recording, the decoding is performed. Means 6
24 so as to decode digital data. Further, for the format conversion means 625,
The decoded signal decoded by the decoding means 624 is stored in the recording device 6
01 is controlled so as to convert to a signal format that can be recorded or reproduced after recording.

The digital data input to the decoding means 624 is subjected to a decoding process to become a decoded signal, that is, an analog signal. For example, if the digital data includes video data and audio data, the decoding means 624 outputs a video signal and an audio signal. The decoded signal is sent to the format conversion means 62.
5 is input. The format conversion unit 625 converts the format of the input decoded signal into the system control unit 6.
26 is converted to the format specified. For example, when the decoded signal is a high-resolution video signal, the video signal is converted into a low-resolution video signal. The decoded signal subjected to the format conversion by the format conversion unit 625 is output to the analog interface 633.

When the recording device 601 determines at the time of the inquiry from the transmission device 621 that the digital data can be recorded or can be reproduced after the recording, the recording device 601 receives the digital data via the digital interface 632. If it is determined at the time of the inquiry from the transmission device 621 that the digital data cannot be recorded or cannot be reproduced after recording, the digital signal is received via the analog interface 633. I do. The digital data is supplied to the switching means 604.
, And the decoded signal is input to the encoding means 603.

The encoding means 603 includes the system control means 6
If it is determined in step 08 that digital data can be recorded or reproduced after recording, no operation is performed. If the system control unit 608 determines that digital data cannot be recorded or cannot be reproduced after recording, it encodes the input decoded signal and outputs it as encoded data.

The switching means 604 is connected to the system control means 60
If it is determined in step 8 that the digital data can be recorded or can be reproduced after recording, the digital data input from the data transmitting / receiving means 607 is output as it is. If the system control unit 608 determines that digital data cannot be recorded or cannot be reproduced after recording, the encoded data input from the encoding unit 603 is output.

The data recording means 605 includes a switching means 604
Performs signal processing required for recording on the recording medium 606 with respect to the data input from. Then, the data subjected to the signal processing is recorded on the recording medium 606.

As described above, the transmitting apparatus according to the fifth embodiment has digital interface 632 and analog interface 633, and digital data to be output can be recorded by recording apparatus 601 at the output destination or can be reproduced after recording. If it is determined that the digital data is output, the digital data is output from the digital interface 632, and the digital data to be output is stored in the recording device 6 of the output destination.
01, if it is determined that recording is not possible or reproduction is not possible after recording, an analog signal obtained by decoding the digital data is converted into a format that can be recorded by the recording device 601 or reproduced after recording. , From the analog interface 633.

Therefore, according to the transmitting apparatus of the fifth embodiment, even when digital data cannot be recorded or cannot be reproduced after recording by the recording apparatus, the digital data can be recorded or reproduced after recording. The data can be converted into a possible analog signal and output, so that the recording device can always record the data (digital data or analog data) output from the transmitting device.

In the fifth embodiment, a case has been described in which either digital data or analog data is output from transmitting apparatus 621 based on the determination of system control means 626, but this is the same as in the first embodiment. May be output. Further, in this case, the recording device 601 is provided with a discriminating means for discriminating whether or not digital data can be recorded or whether or not digital data can be reproduced after recording, as in the first embodiment. It may be determined whether to record.

In the fifth embodiment, transmission apparatus 62
1 is provided with the format conversion unit 625, but the recording device 601 may be provided with the format conversion unit 625 as shown in FIG. In this case, when the system control unit 608 determines at the time of the inquiry from the transmission device 621 that the digital data cannot be recorded or cannot be reproduced after recording, the format conversion unit 625 determines Via the analog interface 633. Then, the received decoded signal is converted into a format recordable on the recording medium 606.

In the fifth embodiment, the system control unit 626 inquires of the recording device 601 about the maximum bit rate that can be recorded or reproduced after recording and the signal format that can be recorded or reproduced after recording. Although the case has been described, this may be other contents.

(Embodiment 6) Embodiment 6 of the present invention will be described with reference to FIG. FIG. 8 shows a recording apparatus 801 having a data recording unit 805, a recording medium 806, a data transmitting / receiving unit 807, and a system control unit 808.
FIG. 21 is a block diagram showing a connection state between a demodulation unit 822, a data transmission unit 823, a system control unit 826, a data conversion unit 827, and a transmission device 821 having a switching unit 828.

In the transmitting device 821, the digitally modulated stream data 831 is input via an antenna or a cable or the like, and the input stream data 831 is demodulated by the demodulation means 822 to be converted into digital data.
The digital data is input to the switching means 828.

The system control means 826 controls the recording device 80
1 is inquired as to whether the digital data obtained by the demodulation means 822 is recordable data or whether it is data that can be reproduced after recording. In addition, it inquires about the format and bit rate of data that can be recorded or reproduced after recording. The contents to be inquired include, for example, the maximum bit rate that can be recorded or reproduced after recording, and the signal format that can be recorded or reproduced after recording.

The above inquiry is made through the data transmission / reception means 823. The contents of the inquiry are received by the data transmission / reception unit 807 of the recording device 801 and sent to the system control unit 808. System control means 808
Then, a reply to the inquiry content from the system control unit 826 is transmitted to the system control unit 826 via the data transmission / reception units 807 and 823.

For example, assuming that the content of the inquiry from the transmission device 821 is a content inquiring about the maximum bit rate that can be recorded by the recording device 801 or that can be reproduced after recording, the system control unit 808 determines that the recording device 801
The maximum recordable bit rate or the maximum reproducible bit rate in the above is returned to the system control means 826 via the data transmission / reception means 807 and 823.

If the content of the inquiry from the transmitting device 821 is to inquire whether the recording device 801 can record digital data of a certain bit rate or whether it can be reproduced after recording, the system control means At 808, the recording device 801 sends a reply to the system control unit 826 via the data transmission / reception units 807 and 823 as to whether digital data of the bit rate can be recorded or reproduced. If the system control unit 808 determines that recording is not possible or is impossible to reproduce after recording, the system control unit 808 replies to the system control unit 826 with a bit rate at which recording is possible or after recording.

If the content of the inquiry from the transmitting device 821 is to inquire whether the recording device 801 can record digital data of a certain signal format or whether it can be reproduced after recording, the system control means At 808, the system controller 826 is replied to the system controller 826 via the data transmission / reception units 807 and 823 as to whether the recording device 801 can record the data in the signal format or whether the data can be reproduced after recording. If the system control unit 808 determines that recording is not possible or cannot be reproduced after recording, the system control unit 808 returns a signal format that can be recorded or reproduced after recording to the system control unit 826.

The system control means 826 controls the recording device 80
If it is determined from the response from 1 that the digital data demodulated by the demodulation unit 822 can be recorded by the recording device 801 or can be reproduced after recording, the digital data is output to the switching unit 828 to the data transmission / reception unit 823. Control.

If the system control means 826 determines from the response from the recording device 801 that the digital data demodulated by the demodulation means 822 cannot be recorded by the recording device 801 or cannot be reproduced after recording, the switching means 82
8 is controlled to output digital data to the data conversion means 827.

The data conversion means 827 converts the input digital data into a bit rate or a signal format that can be recorded by the recording device 801 or reproduced after recording. For example, when it is determined that recording is impossible or reproducible after recording due to a high bit rate of digital data, conversion is performed so as to reduce the bit rate. As a method of reducing the bit rate, there are conceivable methods such as re-encoding digital data after decoding, performing data format conversion on the digital data, and deleting padding data included in the digital data. Here, for example, the digital data includes video data and audio data, and it is determined that the video data cannot be recorded or cannot be reproduced after recording.
If it is determined that audio data can be recorded or reproduced after recording, conversion is performed only on video data.

In the data transmitting means 823, the switching means 82
8 or converts the digital data input from the data conversion means 827 into a data format corresponding to the digital interface 832, and outputs the data to the digital interface 832.

The recording device 801 receives digital data from the transmitting device 821 via the digital interface 832. Digital data is stored in data recording means 8
The signal is input to the recording medium 805 and subjected to necessary signal processing for recording on the recording medium 806, and then recorded on the recording medium 806.

As described above, the transmitting apparatus according to the sixth embodiment has digital interface 832, and it is determined that digital data to be output can be recorded by recording apparatus 801 at the output destination or can be reproduced after recording. In this case, the digital data is directly output from the digital interface 832. If it is determined that the digital data to be output cannot be recorded on the output recording device 801 or cannot be reproduced after recording, the digital data can be recorded on the output recording device 801 in a format that can be recorded, or After recording, the data is converted into a reproducible format, and then output from the digital interface 832.

As described above, according to the transmitting apparatus of the sixth embodiment, even if digital data cannot be recorded or cannot be reproduced after recording by the recording apparatus, recording is possible or reproduction is possible after recording. The digital data can be converted into digital data and output, so that the recording device can always record or reproduce the digital data output from the transmitting device after recording.

In the sixth embodiment, the system controller 826 inquires of the recording device 801 about the maximum bit rate that can be recorded or reproduced after recording and the signal format that can be recorded or reproduced after recording. Although the case has been described, this may be other contents.

(Embodiment 7) Embodiment 7 of the present invention will be described with reference to FIG. FIG. 9 shows a recording device 901 having a data recording unit 905, a recording medium 906, a data receiving unit 907, a system control unit 908, and a data checking unit 909, and a transmitting device 921 having a demodulating unit 922 and a data transmitting unit 923. It is a block diagram which shows a connection state.

In the transmitting device 921, digitally modulated stream data 931 is input via an antenna or a cable or the like, and the input stream data 931 is demodulated by demodulation means 922 to be converted into digital data.
The digital data is input to the data transmission unit 923. The data transmission means 923 converts the input digital data into a data format corresponding to the digital interface 932, and
32.

The recording device 901 receives digital data from the transmitting device 921 via the digital interface 932 by the data receiving means 907. The digital data received by the data receiving unit 907 is returned from the data format for the digital interface to the original data format.
05 is input.

The data inspection means 909 determines whether or not the digital data is data that can be recorded on the recording medium 906. For example, it checks whether or not the bit rate of digital data exceeds the maximum recordable bit rate. Then, the inspection result is notified to the system control unit 908.

The system control means 908 receives the digital data inspection result from the data inspection means 909,
The data recording unit 905 is controlled. Data inspection means 90
If it is determined in step 9 that digital data can be recorded, the system control unit 908 sends the data to the data recording unit 9.
05 is instructed to record digital data on the recording medium 906. If the data checking means 909 determines that digital data cannot be recorded, the system control means 908 sends the data to the data recording means 90.
5 is instructed to stop recording digital data on the recording medium 906.

The data recording means 905 controls the system control means 90 to record the inputted digital data.
8, the digital data is subjected to signal processing and the like necessary for recording on the recording medium 906 and then recorded on the recording medium 906.

As described above, the recording apparatus according to the seventh embodiment has the digital interface 932, and determines whether or not the input digital data can be recorded on the recording medium 906. When it is determined that recording is possible, the digital data is recorded on the recording medium 906,
If it is determined that recording is not possible, the recording of digital data on the recording medium 906 is stopped.

Therefore, according to the recording apparatus of the seventh embodiment, when the bit rate suddenly increases during the recording of digital data, the recording on the recording medium can be stopped, and the reproduction can be stopped. It is not possible to record impossible data. For example, when receiving an MPEG2 transport stream (TS) as digital data from a set-top box as a transmitting device and recording the TS,
If the bit rate of the TS suddenly increases during recording, recording can be stopped, and unreproducible data will not be recorded. Can be.

Eighth Embodiment An eighth embodiment of the present invention will be described with reference to FIG. FIG.
002, data conversion means 1003, switching means 100
4, data recording means 1005, and recording medium 1006
FIG. 4 is a block diagram showing a recording apparatus 1001 having a demodulation unit 1022 and a demodulation unit 1022.

The recording device 1001 inputs the digitally modulated stream data 1031 via an antenna or a cable or the like, and the input stream data 1031
Is demodulated by demodulation means 1022 and converted into digital data. The digital data is input to the determination unit 1002, the data conversion unit 1003, and the switching unit 1004.

The determination means 1002 determines whether the input digital data is data recordable on the recording medium 1006 or not. For example, if the bit rate of the digital data is equal to or higher than the maximum recordable rate of the recording medium 1006, it is determined that recording is not possible. Determination means 1
The determination result in 002 is output to the data conversion unit 1003 and the switching unit 1004.

The data conversion means 1003
If it is determined in step 02 that digital data can be recorded, no operation is performed. If the determination means 1002 determines that digital data cannot be recorded, data conversion of the input digital data is performed. For example, since the bit rate of digital data is high,
When it is determined that recording is not possible in 02, conversion is performed so as to reduce the bit rate. Methods for reducing the bit rate include re-encoding digital data after decoding, performing data format conversion on digital data,
A method of deleting padding data included in digital data can be considered. The digital data converted in this way is output to the switching means 1004.

When the determination means 1002 determines that digital data can be recorded, the switching means 1004 outputs the digital data input from the demodulation means 1022. If the determination means 1002 determines that digital data cannot be recorded, the data conversion means 1003
Outputs the data input from.

The data recording means 1005 is connected to the switching means 10
Signal processing necessary for recording the data output from the recording medium 04 on the recording medium 1006 is performed. Then, the data subjected to the signal processing is recorded on the recording medium 1006.

As described above, the recording apparatus according to the eighth embodiment performs recording when digital data transmitted via an antenna, a cable, or the like 1031 is data that cannot be recorded on the recording medium 1006. The digital data is converted into recordable data and recorded. If digital data transmitted via an antenna or a cable 1031 is recordable data, the digital data is recorded as it is.

Therefore, according to the recording apparatus of the eighth embodiment, even if the transmitted digital data cannot be recorded on the recording medium, the digital data is converted into recordable data to be input. Digital data can be recorded without fail. For example, when the bit rate of the digital data is higher than the recordable rate, the digital data can be converted and recorded so as to be lower than the recordable rate.

In the eighth embodiment, a case has been described where it is determined that recording is not possible when the bit rate of digital data is higher than the recordable rate. However, this may be another case.

In the eighth embodiment, as a method of reducing the bit rate when it is determined that recording is impossible due to the high bit rate of the digital data, the digital data is re-encoded after being decoded. Although a method of performing conversion on data and deleting padding data included in digital data has been described, other methods may be used.

The recording medium in each of the above embodiments of the present invention is a magnetic disk, a magnetic tape, an optical disk,
Any recording medium such as a semiconductor memory may be used.

[0134]

As described above, according to the recording apparatus of the present invention, a digital interface and an analog interface are provided, and digital data input from the digital interface cannot be recorded on a recording medium or cannot be reproduced after recording. In the case of unusual data, when the analog signal input from the analog interface is encoded and converted into encoded data, and then recorded, and the digital data input from the digital interface is data that can be recorded or reproduced after recording In order to record digital data as it is,
Even when digital data input from the digital interface cannot be recorded, encoding and recording the analog signal input from the analog interface can always record data output from the transmission device. . Further, even if digital data input from the digital interface cannot be reproduced after recording on the recording medium, the analog signal input from the analog interface is encoded and recorded. It is always possible to record in a format that can be reproduced after recording.

According to the recording apparatus of the present invention, the recording apparatus has a digital interface and an analog interface, and the digital data input from the digital interface is data that cannot be recorded on a recording medium or cannot be reproduced after recording. An analog signal input from an analog interface is converted into a format, encoded, converted into encoded data and recorded, and digital data input from the digital interface is recordable or reproducible after recording. In this case, since the digital data is recorded as it is, even if the digital data input from the digital interface cannot be recorded, a format capable of recording the analog signal input from the analog interface is used. After conversion, by encoding and recording you can always record the output from the transmission unit data. Further, even if digital data input from the digital interface cannot be reproduced after being recorded on the recording medium, the analog signal input from the analog interface is format-converted, encoded and recorded. The recorded data can always be recorded in a format that can be reproduced after recording.

Further, according to the recording apparatus of the present invention, it has a digital interface and an analog interface, and extracts only data that can be recorded on a recording medium or can be reproduced after recording from digital data input from the digital interface. Of the data contained in the data, data that cannot be recorded on the recording medium or cannot be reproduced after recording is encoded by converting an analog signal input from the analog interface into encoded data, and extracted from digital data. And coded data of analog signals are multiplexed and recorded on a recording medium. Therefore, even if digital data input from the digital interface cannot be recorded, the analog data input from the analog interface can be recorded. By encoding and recording the grayed signal can always record the output from the transmission unit data. Furthermore, since recordable data is extracted from digital data and recorded, it is possible to prevent data quality degradation due to extra re-encoding.

Even if the digital data input from the digital interface cannot be reproduced after being recorded on the recording medium, the analog signal input from the analog interface is recorded. It is always possible to record in a format that can be reproduced after recording. Furthermore, since data that can be reproduced after recording is extracted from digital data and recorded, it is possible to prevent data quality degradation due to extra re-encoding.

According to the recording apparatus of the present invention, a digital interface is provided. When digital data input from the digital interface is data that cannot be recorded on a recording medium, the data is converted into recordable data. If it is data that cannot be reproduced after recording, it is converted to data that can be reproduced after recording and recorded.
If the digital data input from the digital interface is recordable or reproducible after recording, the digital data is recorded as it is. However, by converting the data into recordable data, the data output from the transmission device can always be recorded. Also, even if digital data input from the digital interface cannot be reproduced after recording, the data output from the transmitting device is always converted to data that can be reproduced after recording by converting the data into data that can be reproduced after recording. Can be recorded.

Further, according to the transmitting apparatus of the present invention, the transmitting apparatus has a digital interface and an analog interface, and it is determined that the digital data to be output is recordable or reproducible after recording by the recording apparatus at the output destination. Digital data is output from a digital interface, and if it is determined that the digital data to be output cannot be recorded by the output destination recording device or cannot be reproduced after recording, the digital data is decoded. After changing the analog signal to a format that can be recorded by the recording device or reproducible after recording, the analog signal is output from the analog interface. Even if the digital data can be recorded by the recording device Others can be output by converting renewable analog signals after recording, thereby recording the data output from the always transmitting apparatus in a recording apparatus (digital data or analog data).

According to the transmitting apparatus of the present invention, a digital interface is provided, and when it is determined that the digital data to be output can be recorded or reproduced after recording by the recording apparatus at the output destination, The digital data is output from the interface as it is, and if it is determined that the digital data to be output is data that cannot be recorded by the output destination recording device or cannot be reproduced after recording, the digital data is output to the output destination recording device. After converting to a format that can be recorded or reproduced after recording, it is output from the digital interface, so even if digital data can not be recorded by the recording device or cannot be reproduced after recording, it can be recorded Alternatively, it can be converted to digital data that can be reproduced after recording and output. It can be reproduced after recording or recording digital data output from the always transmitting apparatus in a recording apparatus side by the.

Further, according to the recording apparatus of the present invention, the recording apparatus has a digital interface, determines whether or not the input digital data can be recorded on a recording medium. The data is recorded on the recording medium, and when it is determined that recording is not possible, the recording of the digital data on the recording medium is stopped. For example, during the recording of the digital data, the bit rate suddenly increases. In such a case, the recording on the recording medium can be stopped, and the data that cannot be reproduced can be prevented from being recorded.

According to the recording apparatus of the present invention, when digital data input via an antenna, a cable, or the like is data that cannot be recorded on a recording medium, it is converted into recordable data. If the digital data recorded and transmitted via an antenna, a cable, or the like is recordable data, the digital data is recorded as it is, so that the transmitted digital data cannot be recorded. Even in this case, by converting the data into recordable data, digital data can always be recorded.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a recording device and a transmission device according to a first embodiment of the present invention.

FIG. 2 is a block diagram illustrating a recording device and a transmission device according to a second embodiment of the present invention.

FIG. 3 is a block diagram for explaining a recording device and a transmitting device according to a third embodiment of the present invention.

FIG. 4 is a block diagram illustrating a recording device and a transmission device according to a fourth embodiment of the present invention.

FIG. 5 is a block diagram illustrating a recording device and a transmission device according to a fourth embodiment of the present invention.

FIG. 6 is a block diagram illustrating a recording device and a transmission device according to a fifth embodiment of the present invention.

FIG. 7 is a block diagram illustrating a recording device and a transmission device according to a fifth embodiment of the present invention.

FIG. 8 is a block diagram illustrating a recording device and a transmission device according to a sixth embodiment of the present invention.

FIG. 9 is a block diagram illustrating a recording device and a transmission device according to a seventh embodiment of the present invention.

FIG. 10 is a block diagram for explaining a recording apparatus according to Embodiment 8 of the present invention.

FIG. 11 is a block diagram for explaining a conventional recording device and a transmitting device.

[Explanation of symbols]

101,201,301,501,601,801,9
01, 1001 Recording device 102, 202, 302, 502, 1002 Judgment means 103, 203, 303, 603 Encoding means 503, 827, 1003 Data conversion means 104, 204, 504, 604, 828, 1004
Switching means 105, 205, 305, 505, 605, 805, 1
005 Data recording means 106, 206, 306, 506, 606, 806, 9
06,1006 Recording medium 107,207,307,507,907 Data receiving means 608,626,808,826 System control means 908 Data control means 308 Data extraction means 909 Data inspection means 121,221,321,521,621,821 , 9
21 transmitting device 122, 222, 332, 522, 622, 822, 9
22, 1022 demodulation means 123, 223, 323, 523, 923 data transmission means 607, 623, 807, 823 data transmission / reception means 124, 224, 324, 624 decoding means 125, 225, 325, 625, 725 format conversion means 131 , 231,331,531,631,631,8
31,931,1031,2003 Stream data 132,232,332,532,632,832,9
32 Digital interface 133, 233, 333, 633 Analog interface

Claims (13)

[Claims] An input unit for inputting first digital data and determining whether the first digital data is recordable or reproducible after recording; and When a first analog signal obtained by decoding digital data is input, and the determination unit determines that the first digital data cannot be recorded or cannot be reproduced after recording, the first analog signal is output. Format conversion means for format-converting the signal into a second analog signal, and when the first or second analog signal is input, and when the determination means determines that the first digital data cannot be recorded, Encoding means for encoding the first or second analog signal into second or third digital data, together with the first digital data, When the second digital data or the third digital data is input and the determination means determines that the first digital data is recordable or reproducible after recording, the first digital data is output and recorded. Switching means for outputting the second or third digital data when it is determined that the digital data cannot be reproduced or cannot be reproduced after recording; and data recording means for recording the digital data output from the switching means on a recording medium. A recording device comprising: 2. The recording apparatus according to claim 1, wherein the determination unit receives the first digital data as an input,
It is determined whether or not recording is possible for each type of data included in the first digital data, or whether or not reproduction is possible after recording, and the format conversion means decodes the first digital data. The first analog signal obtained by the conversion is input, and for the data of the type determined to be unrecordable or unreproducible after recording by the determination means, the first analog signal is formatted into a second analog signal. The encoding unit receives the first or second analog signal as input, and the data of the type determined to be unrecordable or unreproducible after recording by the determination unit is the first or second analog signal. The second analog signal is encoded into second or third digital data, and the first digital data is input and can be recorded or recorded by the discriminating means. Data extraction means for extracting data of a type determined to be reproducible later as fourth digital data; and multiplexing the second or third digital data with the fourth digital data to obtain fifth digital data. And a multiplexing means for generating the fifth digital data, wherein the data recording means records the fifth digital data on a recording medium. 3. A discriminating means for receiving first digital data as input and judging whether or not the first digital data is recordable, and determining that the first digital data is not recordable by the discriminating means. If determined, the data conversion means for converting the digital data into recordable second digital data; and the first and second digital data as inputs, and the first digital A switching unit that outputs the first digital data when it is determined that the data can be recorded, and outputs the second digital data when it is determined that the data cannot be recorded; Data recording means for recording the digital data obtained on a recording medium. 4. The recording apparatus according to claim 3, wherein the determination unit determines that recording is not possible when a bit rate of the first digital data is equal to or higher than a predetermined bit rate. A recording device characterized by the above-mentioned. 5. A determining means for receiving first digital data as input and determining whether said first digital data is reproducible after recording, and wherein said determining means determines whether said first digital data is reproducible after recording. When it is determined that reproduction is impossible, data conversion means for converting the first digital data into reproducible second digital data after recording, and the first and second digital data as inputs, The first digital data is output when the first digital data is determined to be reproducible by the determination means, and the second digital data is output when the first digital data is determined to be unreproducible. A recording apparatus comprising: a switching unit; and a data recording unit that records digital data output from the switching unit on a recording medium. 6. The recording apparatus according to claim 5, wherein the discriminating means cannot reproduce after recording if the encoding method of the first digital data is a method that cannot be decoded by the recording device. A recording device that determines that 7. A system control means for inquiring whether or not digital data to be output can be recorded by a recording device at an output destination, or whether or not the digital data to be output can be reproduced after recording, based on an inquiry result of the system control means. A data transmitting unit that outputs the digital data when the digital data is determined to be recordable or reproducible after recording by the recording device; and Decoding means for decoding the digital data into a first analog signal when it is determined that recording is impossible or cannot be reproduced after recording, and the first analog signal is recorded by the recording device. A format converter that converts the data into a second analog signal that is a data format that can be read or played back after recording. When the digital data is determined by the recording device to be unrecordable or unreproducible after recording from the result of the inquiry of the system control means, the decoding means outputs the first analog signal. Or the format converter outputs a second analog signal. 8. A system control means for inquiring a recording device as an output destination of the first digital data about a recordable data format, and recording the digital data in the recording device based on an inquiry result of the system control means. Data conversion means for converting the first digital data into second digital data in a recordable data format when it is determined that the first and second digital data are not input; If it is determined from the result of the inquiry by the system control means that the first digital data can be recorded by the recording device, the first digital data is output, and from the result of the inquiry by the system control means. If the recording device determines that the digital data cannot be recorded, the second data Transmitting device, characterized in that it comprises a data transmitting means for outputting the digital data. 9. The transmission device according to claim 8, wherein the inquiry by the system control means is an inquiry about a bit rate of the digital data or an inquiry about a format of image data of the digital data. Transmitting device. 10. A system control means for inquiring a recording device, which is an output destination of first digital data, of a data format that can be reproduced after recording, and the recording device outputs the digital data based on an inquiry result of the system control means. When it is determined that the first digital data is unreproducible after recording, data conversion means for converting the first digital data into second digital data in a data format reproducible after recording, the first and second The digital data is input, and when it is determined that the first digital data can be reproduced after recording by the recording device from the result of the inquiry of the system control means, the first digital data is output. The first digital data is reproduced after recording by the recording device based on the inquiry result of the system control means. If it is determined to be a, the transmission apparatus comprising: a data transmitting means for outputting said second digital data. 11. The transmission device according to claim 10, wherein the inquiry by the system control means is an inquiry about a bit rate of the digital data or an inquiry about a format of image data of the digital data. Transmitting device. 12. A data inspection means for receiving digital data as input and judging whether or not the digital data can be recorded; and when the data inspection means determines that the digital data can be recorded, the digital inspection means Data recording means for recording data on a recording medium, and stopping recording of the digital data on the recording medium when the data inspection means determines that the digital data is not recordable. Recording device. 13. A demodulating means for demodulating digitally modulated stream data into first digital data, receiving said first digital data as input, and determining whether or not said first digital data is recordable. Discriminating means, and when the discriminating means determines that the first digital data is not recordable, data converting means for converting the digital data into second digital data in a recordable data format; Receiving the first and second digital data as input, and when the determination means determines that the first digital data is recordable, outputs the first digital data and determines that recording is not possible Switching means for outputting the second digital data when the digital data has been output, and a recording medium for storing the digital data output from the switching means. Recording apparatus comprising: a data recording means for recording.