JP2001148831A - Recording and reproducing device and transmitter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To considerably reduce a total time until video recording completion from the time when start of video recording is instructed. SOLUTION: When a recording start of a program repetitively broadcast on a channel 300 is instructed, a current time T2 at that time, a next repetitive top time T1 of a program, a program time length, a recording end time T3 resulting from adding the program time length to the current time T2, are detected, and a program from the current time T2 until the recording end time T3 is recorded. Moreover, the recording positions at the current time T2, the repetitive top time T1 and the recording end time T3 are stored. In the case of reproduction, various recording positions stored at recording are referenced, the program from the recording position at the repetitive top time T1 until the recording position at the recording end time T3 is reproduced and then the program from the recording position of the current time T2 until the recording position at the repetitive top time T1 is reproduced. Then a wait time at the recording start is made zero and the program can be reproduced from the top of the program in the order of substantial broadcasting.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording / reproducing apparatus and a transmitting apparatus, and more particularly, to an apparatus for recording and reproducing information of various programs transmitted by digital broadcasting and for continuously reproducing the same program. The present invention relates to an apparatus for transmitting a digital broadcast having a channel to be repeatedly broadcast.

[0002]

2. Description of the Related Art At present, broadcasting services using CS satellites have already been started as digital broadcasting.
Digital broadcasting services using the S satellite are being planned.

[0003] In such digital broadcasting, with the improvement of compression technology and modulation / demodulation technology, one transponder requires one transponder.
In addition to a plurality of pieces of program data, a program guide accompanying program, detailed program information, and the like can be simultaneously broadcast. For this reason, a method has been used in which a popular program is repeatedly transmitted on the same channel and can be viewed with a short waiting time. In order to further reduce the waiting time of a viewer, a so-called near video on demand system has been used. In this near video on demand system, 1
One content is repeatedly broadcast using a plurality of channels in the same transponder with a shifted start time. The viewer can shorten the waiting time until the start of viewing by selecting the program whose start time is closest in the program table.

On the other hand, when these digital broadcasts are recorded on a predetermined recording medium (such as a magnetic tape or a magnetic disk), the compressed and multiplexed information of one transponder can be used as it is, or only the necessary transport stream can be extracted. Record the data as is. by this,
Time-shift viewing can be performed without deteriorating image quality.

[0005]

When recording a program in a recording apparatus for receiving and recording a conventional digital broadcasting system, it is necessary to instruct recording at the start of broadcasting of the program to be recorded or to make a timer reservation to start recording from the start of broadcasting. was there. In any case, there is a problem that the recording of the desired program is not completed unless the time obtained by adding the waiting time until the start of broadcasting of the program to be recorded and the broadcasting time of one program has elapsed. The same applies to the case where the same program is repeatedly broadcast or the case where the broadcast is performed by near video on demand, in which the broadcast start time is shifted by using a plurality of channels, until the end of the recording. The time and the broadcast time for one program had to elapse.

Therefore, an object of the present invention is to significantly reduce the total time from when recording start is instructed to when recording is completed.

[0007]

Means for Solving the Problems and Effects of the Invention In order to achieve the above object, the present invention has the following features. A first invention is a recording / reproducing apparatus for recording and reproducing information of various programs sent by digital broadcasting, comprising: a recording unit including a predetermined recording medium;
In the case where the digital broadcast includes a predetermined channel for continuously and repeatedly broadcasting the same program, when the start of recording of the repeatedly broadcasted program is instructed, the current time T2 and the time of the repeated broadcasted program are changed. Time detection means for detecting the next repetition start time T1 and the program time length, and the recording end time T3 obtained by adding the program time length to the current time T2; and when the time detection means detects various times, Recording end time T3 from current time T2
Recording control means for recording, in the recording means, a transport stream of a digital broadcast including at least a stream of a predetermined channel during the time period up to, and
Recording position storage means for storing the respective recording positions on the recording means at the repetition start time T1 and recording end time T3, and the recording position storage means when the reproduction start of the repeatedly broadcasted program is instructed. By referring to the various recording positions, the recording means firstly determines the recording end time T3 from the recording position at the repetition start time T1.
Reproduction control means for reproducing the transport stream existing up to the recording position of the current time T2 and subsequently reproducing the transport stream existing from the recording position of the current time T2 to the recording position of the repetition start time T1.

As described above, according to the first aspect, when the digital broadcast includes a predetermined channel for continuously and repeatedly broadcasting the same program, the recording start of the repeatedly broadcasted program is instructed. When the recording start is instructed without waiting for the next head of the program to appear, the recording is started for the time corresponding to the program length. And the total recording time can be greatly reduced. In addition, at the time of reproduction, since the reproduction is performed in a different order from that at the time of recording, the reproduction can be performed according to the originally broadcast order from the beginning of the program.

According to a second aspect, in the first aspect, a separating means for separating and extracting at least program-related information from a transport stream of the digital broadcast, and a digital broadcast having the same program based on the program-related information. Determining means for determining whether a predetermined channel to be broadcast continuously and repeatedly is included; and
When the determination means determines that the digital broadcast includes a predetermined channel, the repetition start time T1 and the program time length are detected based on the program-related information.

As described above, according to the second aspect, it is determined whether or not a channel for repeatedly broadcasting the same program is included in the transport stream of the digital broadcast, and such a channel is included. Only if
Since the predetermined recording process is performed, it is possible to prevent the undesirable recording process from being performed on other different channels.

In a third aspect based on the second aspect, the separating means further separates and extracts the stream of each channel from the transport stream of the digital broadcast, and the recording control means further comprises: By extracting an identifier for identifying the stream and setting the identifier in the separating means, the stream of the predetermined channel is separated, and as a result, the separated stream of the predetermined channel is recorded in the recording means. And

As described above, according to the third aspect, only the stream of the channel to be recorded is separated and recorded in the recording means, so that the recording capacity of the recording means is not wasted. .

[0014] In a fourth aspect based on the third aspect, the separating means further comprises a reference time for decoding the program, which is transmitted from the transport stream of the digital broadcast at fixed time intervals. The time detection means converts the repetition start time T1, the current time T2, and the recording end time T3 into corresponding PCR values, respectively, and the recording control means converts the PCR by the time detection means. The recording timing of a stream of a predetermined channel is controlled by comparing the various PCR values with the real-time PCR separated by the separating means.

As described above, according to the fourth aspect, the recording start timing and the recording end timing are managed on the basis of the PCR value which is the basic clock for encoding and decoding. Stream connection from the end time T3 to the current time T2 can be performed more accurately, and disturbance of a decoded image in stream connection can be prevented.

According to a fifth aspect of the present invention, in the third aspect, a PTS for detecting a PTS value included in a stream of a specific channel separated by the separating means and transmitted for each predetermined number of video frames is provided. The time detecting means further includes a repetition start time T1, a current time T2, and a recording end time T3, each of which corresponds to a corresponding PT.
The recording control means converts the various PTS values converted by the time detection to the real-time PTS detected by the PTS detecting means, thereby controlling the recording timing of the stream of the predetermined channel. Features.

As described above, according to the fifth aspect, the recording start timing and the recording end timing are managed using the PTS value designating the decode output timing in a fixed unit of the stream. The connection of the stream from the recording end time T3 of the hour to the current time T2 can be performed more accurately, and disturbance of the decoded image in the stream connection can be prevented.

According to a sixth aspect of the present invention, there is provided a recording / reproducing apparatus for recording and reproducing information of various programs transmitted by digital broadcasting, wherein the recording means including a predetermined recording medium and the digital broadcasting play the same program. If n (n is a natural number of 2 or more) channels that are continuously and repeatedly broadcast are included, and the broadcast start times of these n channels are shifted from each other by a fixed time, the repeated broadcast is performed. When the recording start of the program
The current time T2, the repetition start time T1 of the program that appears earliest after the current time T2, the time length of the program, and the time length of the program, 1 / n, and the recording end obtained by adding to the current time T2. A time detecting means for detecting the time T3, and a digital broadcast transformer including at least n channel streams during the time period from the current time T2 to the recording end time T3 when various times are detected by the time detecting means. Recording control means for recording the port stream in the recording means; recording position storage means for storing respective recording positions on the recording means at the current time T2, the repetition start time T1 and the recording end time T3;
When instructed to start playing a repeatedly broadcasted program,
By referring to the various recording positions stored in the recording position storage unit, the recording unit first reproduces the transport stream existing from the recording position at the repetition start time T1 to the recording position at the recording end time T3. The transport stream existing from the recording position at the current time T2 to the recording position at the recording end time T3 is repeatedly reproduced n-1 times, and further, exists from the recording position at the current time T2 to the recording position at the repetition start time T1. Playback control means for playing back the transport stream.

As described above, according to the sixth aspect, the digital broadcast includes n (n is a natural number of 2 or more) channels that continuously and repeatedly broadcast the same program. When the broadcast start time of the n channels is deviated from each other by a fixed time, and when the recording start of the repeatedly broadcast program is instructed, the recording start is instructed without waiting for the next head of the program to appear. Since the recording is started from the point of time when the recording is started and the recording is performed for 1 / n time of the program length, the waiting time at the start of the recording can be set to 0, and the recording time length can be greatly reduced. In addition, at the time of reproduction, since the reproduction is performed in a different order from that at the time of recording, the reproduction can be performed according to the originally broadcast order from the beginning of the program.

In a seventh aspect based on the sixth aspect, the program-related information separating means for separating and extracting at least the program-related information from the transport stream of the digital broadcast, and the digital broadcast is provided based on the program-related information. determining means for determining whether or not the digital broadcast includes n channels, wherein the time detecting means determines, based on the program-related information, when the determining means determines that the digital broadcast includes n channels. Thus, the repetition start time T1 and the program time length are detected.

As described above, according to the seventh aspect, it is determined whether or not n channels for repeatedly broadcasting the same program are included in the transport stream of the digital broadcast. Since the predetermined recording process is performed only when the data includes the channel, it is possible to prevent an inconvenient recording process from being performed on another different channel.

According to an eighth invention, in the seventh invention, an identifier for identifying a stream of n channels is extracted from the program-related information, and the beginning of the program of each channel appears repeatedly starting from the beginning time T1. When the times to perform are arranged in order in the past in time, playback information creation means for creating playback information in which the identifiers of the respective channels are arranged in that order and storing the playback information in a predetermined location, and reading from the recording means. Stream separating means for separating and extracting the streams of the respective channels from the transport stream of the outputted digital broadcast, wherein the playback control means refers to the stored playback information and arranges the identifiers of the n channels in the array. Of the channels to be played back at that time by individually picking up in accordance with the order of Characterized in that to separate the Le stream.

As described above, according to the eighth aspect, the order of the channel to which the same program is sent is determined from the program-related information, and the order of the identifier to be selected at each time is separately stored. Therefore, a continuous stream of one program can be reproduced from short recording information.

In a ninth aspect based on the seventh aspect, the program-related information separating means is further transmitted from the transport stream of the digital broadcast at regular time intervals, and is provided for decoding the program. P to be the reference time
The CR is separated and extracted, the time detecting means converts the repetition start time T1, the current time T2, and the recording end time T3 into corresponding PCR values, respectively. The recording timing of the transport stream is controlled by comparing the PCR value with the real-time PCR separated by the separating means.

As described above, according to the ninth aspect, the recording start timing and the recording end timing are managed on the basis of the PCR value which is the basic clock for encoding and decoding. Stream connection from the end time T3 to the current time T2 can be performed more accurately, and disturbance of decoded images in stream connection can be prevented.

According to a tenth aspect, in the sixth aspect, the PTS for detecting the PTS value included in the stream of each channel in the transport stream of the digital broadcast and transmitted every predetermined number of video frames is provided. The time detecting means further converts the start time T1, the current time T2, and the recording end time T3 into corresponding PTS values, respectively, and the recording control means converts the various PTS values converted by the time detection. The recording timing of the transport stream is controlled by comparing with the real-time PTS detected by the PTS detecting means.

As described above, according to the tenth aspect, the recording start timing and the recording end timing are managed by using the PTS value designating the decode output timing in a fixed stream unit. The connection of the stream from the recording end time T3 of the hour to the current time T2 can be performed more accurately, and disturbance of the decoded image in the stream connection can be prevented.

An eleventh invention is a device for transmitting a digital broadcast having a channel for broadcasting the same program continuously and repeatedly, wherein the encoding means encodes the input program information, and the encoding means encodes the program information. The encoding unit includes a counter unit that sets a count value to 0 when encoding the head part, increments the count value each time the encoding unit creates a sequence header, and a transmission unit that transmits an encoded output from the encoding unit. When the sequence header is created, the count value of the counter is inserted into the extended user area of the sequence header.

As described above, according to the eleventh aspect, it is possible to assign a continuous number to a stream in a fixed unit of encoding, and this is caused by lack of a stream, a low electric field, and the like on the receiving side. It is possible to easily determine the time location and the like of the error stream. In addition, it is possible to easily determine the context in a unit of coding in stream editing or the like without decoding the coding.

A twelfth invention is a recording / reproducing apparatus for recording and reproducing information of various programs transmitted by digital broadcasting. The digital broadcasting is a recording / reproducing apparatus which reproduces the same program continuously and repeatedly. In the extended user area of the sequence header included in the stream of the predetermined channel, the count value is 0 at the beginning of the program, and thereafter, is incremented each time the sequence header appears. Recording means including a predetermined recording medium; separating means for separating and extracting at least program-related information and a stream of each channel from a digital broadcast transport stream; and recording of a program to be repeatedly broadcast. When a start is instructed, a stream for identifying a stream of a predetermined channel from program-related information is Extracting Besshi set to separation means,
An identifier setting means for separating and extracting a stream of a predetermined channel; a header detecting means for detecting a count value stored in an extended user area of a sequence header from a stream of the predetermined channel separated by the separation means; After the recording start of the broadcasted program is instructed, the predetermined time separated by the separating means from the time when the count value is first detected by the header detecting means until the same count value is detected again thereafter. A recording control unit for recording the stream of the channel of the predetermined channel on the recording unit, and a timing at which the recording control unit starts recording of the stream of the predetermined channel is a recording start timing C2, and a timing at which the header detection unit detects the count value 0 is repeated. As the head timing C1, the recording control means When the timing has finished the recording of the channel of the stream was recorded end timing C3, these recording start timing C2, repeated head timing C
1 and a recording position storing means for storing the recording position of the stream on the recording means at the recording end timing C3, and various recordings stored in the recording position storing means when the reproduction start of the repeatedly broadcasted program is instructed. By referring to the position, the recording means firstly determines the recording end timing C3 from the recording position of the repetition start timing C1.
And reproduction control means for reproducing a stream existing from the recording position at the recording start timing C2 to the recording position at the repetition start timing C1.

As described above, according to the twelfth aspect, the digital broadcast includes n (n is a natural number of 2 or more) channels that repeat the same program continuously and repeatedly. When the broadcast start times of the n channels are shifted from each other by a fixed time,
When an instruction to start recording a repeatedly broadcasted program is issued,
The recording is started from the point when the recording start is instructed without waiting for the next head of the program to appear, and recording is performed for 1 / n hours of the program length. And the recording time length can be greatly reduced.
In addition, at the time of reproduction, since the reproduction is performed in a different order from that at the time of recording, the reproduction can be performed according to the originally broadcast order from the beginning of the program. Furthermore, since the recording start / end is controlled using the number given in one unit of encoding, the connection of the stream from the recording end timing C3 to the recording start timing C2 at the time of reproduction is ensured. be able to.

According to a thirteenth aspect, in the twelfth aspect,
Based on the program related information separated by the separating means,
The digital broadcast further includes a determination unit that determines whether a predetermined channel is included, and the identifier setting unit includes:
In response to the determination that the digital broadcast includes a predetermined channel, an identifier setting operation for the separating means is performed.

As described above, according to the thirteenth aspect, it is determined whether or not a channel for repeatedly broadcasting the same program is included in the transport stream of the digital broadcast, and such a channel is included. Only when this is the case, the process shifts to the predetermined recording process, so that it is possible to prevent the inconvenient recording process from being performed on other different channels.

A fourteenth invention is a recording / reproducing apparatus for recording and reproducing information of various programs transmitted by digital broadcasting, wherein the digital broadcasting broadcasts the same program continuously and repeatedly. In addition, n broadcasts (n
Are natural numbers of 2 or more), and the extended user area of the sequence header included in each stream of these n channels has 0 at the beginning of the program. A count value that is incremented each time a sequence header appears is inserted, and at least program-related information and a stream of each channel are separated and extracted from recording means including a predetermined recording medium and a transport stream of digital broadcasting. When the start of recording of a repeatedly broadcasted program is instructed, an identifier for identifying a stream of n channels is extracted from the program-related information and set as the separating means, Identifier setting means for separating and extracting the stream; and Header detecting means for detecting the count value stored in the extended user area of the sequence header, and when an instruction to start recording of a repeatedly broadcasted program is issued, based on the program-related information, The channel where the next repetition start timing of the program appears earliest is detected, the header detection unit is instructed to detect the count value included in the stream of the detected channel, and the n number of channels separated by the separation unit are detected. A recording start control unit for causing the recording unit to start recording the stream of the channel, and a count value detected by the header detection unit, and the first detected count value after the instruction to start recording of the repeatedly broadcasted program is issued. K
f, the count value detected immediately before the count value becomes 0 is Kmax, and the current count value is Kt, the value Kx obtained by the following equation: Kx = (Kmax / n) − (Kmax−Kf) Count value monitoring means for stopping the recording of the stream of n channels to the recording means when Kt = Kx is satisfied, and recording the timing at which the recording means started recording the stream of n channels. When the start timing C2, the timing at which the header detection means detects the count value 0 is the repeated start timing C1, and the timing at which the recording means finishes recording the streams of n channels is the recording end timing C3, At timing C2, repetition start timing C1 and recording end timing C3, Recording position storing means for storing the recording position of the stream, and when the reproduction start of the program repeatedly broadcast is instructed, by referring to the various recording positions stored in the recording position storing means, From the recording position of the repetition start time C1 to the recording end time C
3, the stream existing from the recording position at the recording start timing C2 to the recording position at the recording end time C3 is reproduced n-1 times repeatedly, and further, the recording start timing C2 And a playback control means for playing back a stream existing from the recording position of to the recording position of the repetition start time C1.

As described above, according to the fourteenth aspect, the digital broadcast includes n (n is a natural number of 2 or more) channels that continuously and repeatedly broadcast the same program. When the broadcast start times of the n channels are shifted from each other by a fixed time,
When an instruction to start recording a repeatedly broadcasted program is issued,
The recording is started from the point when the recording start is instructed without waiting for the next head of the program to appear, and recording is performed for 1 / n hours of the program length. And the recording time length can be greatly reduced.
In addition, at the time of reproduction, since the reproduction is performed in a different order from that at the time of recording, the reproduction can be performed according to the originally broadcast order from the beginning of the program. Furthermore, since the recording start / end is controlled using the number given in one unit of encoding, the connection of the stream from the recording end timing C3 to the recording start timing C2 at the time of reproduction is ensured. be able to.

According to a fifteenth aspect, in the fourteenth aspect,
When the times at which the heads of the programs of the n channels appear repeatedly starting from the repetition head time C1 are sequentially arranged in time retroactively, the identifiers of the n channels extracted by the identifier setting means are arranged in that order. Playback information creation means for creating arrayed playback information and storing it in a predetermined location; and stream separation means for individually separating and extracting each channel stream from n channel streams read from the recording means. The playback control means refers to the stored playback information, individually picks up the identifiers of the n channels in accordance with the order of the arrangement, and sets the identifiers in the stream separation means in chronological order. At this time, a stream of a channel to be reproduced is separated.

As described above, according to the fifteenth aspect, the order of channels on which the same program is sent is determined, the order of identifiers to be selected at each time is separately stored, and a stream is selected according to the order at the time of reproduction. Therefore, a continuous stream of one program can be reproduced from short recording information.

According to a sixteenth aspect, in the fourteenth aspect,
Based on the program related information separated by the separating means,
The digital broadcast further includes a determination unit that determines whether n channels are included, and the identifier setting unit includes:
In response to the determination that the digital broadcast includes n channels, an identifier setting operation for the separating means is performed.

As described above, according to the sixteenth aspect, it is determined whether or not a channel for repeatedly broadcasting the same program is included in a digital broadcast. Only a predetermined recording process is performed, so that an inconvenient recording process can be prevented from being performed on other different channels.

[0039]

(First Embodiment) FIG. 1 is a block diagram showing a configuration of a recording / reproducing apparatus according to a first embodiment of the present invention. In FIG. 1, a recording / reproducing apparatus according to the present embodiment includes a tuner 1, a separating unit 2, a decoder 3,
An RT 4, a control unit 5, a PTS detection unit 6, a recording / reproduction control unit 7, a hard disk 8, and a bus 9 are provided. The separating unit 2 includes a separating circuit 10 and switches 11, 1
2 and 13.

The tuner 1 selects a program and outputs a transport stream of one transponder. In addition,
As a recording / reproducing device, a transport stream may be input from an external tuner. The separation unit 2 separates a stream of a specific program and program-related information from a multiplexed transport stream, and switches streams. The decoder 3 decodes the separated stream and reproduces video and audio. C
RT4 displays the decoded video. Control unit 5
Includes a CPU and controls the entire recording and reproducing apparatus. PT
The S detection unit 6 determines whether the PTS (Prese
nt Time Stamp).
Here, the PTS is time management information for reproduction output, and is mainly used for measuring relative time. Normally, the PTS is added to an encoding sequence layer that transmits a predetermined number of images as one unit. The recording / reproduction control unit 7 controls recording and reproduction of a stream on the hard disk 8. The bus 9 connects between the control unit 5 and each block, and transmits control signals and the like. Separation circuit 10
Separates a stream of a specific program and related information from the stream. Switches 11, 12, and 13 switch streams.

The information to be broadcast at the same time includes video / audio coding information constituting a program, information for extracting a video / audio stream, a PCR which is a reference clock for decoding video / audio, and a program table. And detailed content information of the program.

FIG. 2 shows an example of a broadcast mode of a program on a certain channel. As shown in FIG. 2, in the channel number 300, the one-hour program of the title "movie xxx" is repeatedly broadcast.

The operation of the recording / reproducing apparatus according to the first embodiment for recording a program broadcast in the manner shown in FIG. 2 will be described below. At a timing T2, when the user instructs recording of the channel 300, the control unit 5 determines the title and program detailed information of the program currently being broadcast on the channel 300 from the program-related information already acquired via the separation circuit 10. And extract
Next, the control unit 5 determines that the broadcast time is one hour, and transmits the title, program detailed information, and broadcast time length of the program to be broadcast from the next 8:00 to the current broadcast time. It is compared with those of the program to determine whether they match. In this case, since they match, the control unit 5 determines that the currently broadcast program and the program broadcast from 8:00 are the same.

Next, the control unit 5 extracts an identifier for separating the stream of the channel 300 from the program related information, and instructs the separation circuit 10 to separate the stream of the channel 300. Further, the control unit 5 includes the switch 1
1 is switched to the separation circuit output side, and the switch 13 is switched to the ON side. Further, the control unit 5 instructs the PTS detection unit 6 to detect a PTS.

Next, the control unit 5 determines from the program-related information that the next program start time is 8:00 and the program time length is 1
The time is determined, and a value obtained by converting one hour into a PTS value is calculated. The conversion to the PTS value can be easily performed because the unit clock cycle of the PTS is determined. Next, the control unit 5 continuously obtains the program-related information and monitors whether the time information (current time) included in the program-related information has reached 8:00.

The PTS detector 6 extracts the transport packet of the input video, extracts the PTS included in the header of the video stream, and notifies the controller 5 of the extracted PTS. The control unit 5 uses the extracted PTS value as the recording start time T2.
Further, a PTS value obtained by adding a PTS value of one hour which is a program time length to T2 is calculated as T3, and the recording / reproduction control unit 7 is instructed to record a stream from time T2.
Accordingly, the recording / reproduction control unit 7 starts recording the stream of the channel 300 on the hard disk 8 and temporarily stores the recording start position on the hard disk 8 as the recording position at time T2.

When the current time reaches 8:00, the control unit 5 monitoring the time information included in the program-related information becomes 8:00:
00, and immediately after that, the PTS detector 6
The recording / reproducing control unit 7 sets the PTS value detected in step 1 as T1.
Notify. The recording / reproduction control unit 7 determines the stream recording position on the hard disk 8 at
1 is temporarily stored as the recording position.

The control unit 5 calculates the time T3 which has already been calculated.
When it is detected that the PTS value and the PTS value from the PTS detection unit 6 are the same or closest, the recording / reproduction control unit 7 is notified and the recording of the stream to the hard disk 8 is stopped. Accordingly, the recording / reproduction control unit 7 stops recording on the hard disk 8 at the timing of time T3, determines the recording position on the hard disk at time T3, and determines the recording position at time T1 that has already been temporarily stored. The information is recorded in the directory area of the hard disk 8 together with the recording position at the time T2.

Next, an operation in the case where the broadcast program of the channel 300 recorded in the above-described manner is reproduced by the recording / reproducing apparatus of the first embodiment will be described. When the user issues a reproduction instruction, the control unit 5 sets the recording / reproduction control unit 7
, The switch 11 is switched to the recording / reproduction control unit 7 side, and the switch 12 is turned on. The recording / reproduction control unit 7 receiving the reproduction instruction from the control unit 5 starts the reproduction control of the stream recorded on the hard disk 8. First, the recording / reproduction control unit 7 reads out the recording position information recorded in the directory area of the hard disk 8,
Determine the playback order of the recorded streams. Based on this determination, the recording / reproduction control unit 7 first reads the stream recorded starting from the recording position at time T1 from the hard disk 8 sequentially. Then, the recording / reproduction control unit 7 monitors the read position of the hard disk 8 and
When the recording position at time T3 is reached, reading from the recording position at time T2 is continued. Lastly, the recording / reproduction control unit 7 stops reading when the recording position at the time T1 is reached. The read stream is decoded by the decoder 3 and displayed on the CRT 4 from the beginning of the program.

In the first embodiment, the PTS value detected by the PTS detector 6 is used as time information for recording / reproduction control.
R (Program Clock Reference)
Even if a transport packet having e) is extracted and the detected PCR value is used as time information, the program can be recorded from the middle of the program and reproduced from the beginning of the program in the same manner as described above. Also, by extracting time information included in the program-related information and using it as time information, similarly, it can be recorded from the middle of the program and reproduced from the beginning of the program.

Also, in the first embodiment, since the reproduced stream is reproduced in an order different from the order of the transmitted stream, the PRC and PTS values of the reproduced stream are continuous values when shifting from time T3 to time T2. However, the PCR value and the PTS value after the time T2 can be easily made continuous values by giving the PCR value and the PTS value after the time T2 an offset by the value of the program time length with reference to the PCR and the PTS value at the time T1 at the time of reproduction. .

(Second Embodiment) FIG. 3 shows a second embodiment of the present invention.
FIG. 3 is a block diagram illustrating a configuration of a recording / reproducing device according to the embodiment. In FIG. 3, the recording / reproducing apparatus according to the present embodiment includes:
Tuner 21, separation unit 22, decoder 23, CR
T24, control unit 25, PTS detection unit 26, recording /
A reproduction control unit 27, a hard disk 28, and a bus 29 are provided. The separation unit 22 includes a separation circuit 30 and switches 31, 32, and 33.

The tuner 21 selects a program and outputs a transport stream of one transponder. Note that the recording / reproducing device may be configured to input a transport stream from an external tuner. The separating unit 22 separates the stream of the specific program and the program-related information from the multiplexed transport stream, and switches the streams. Decoder 2
3 decodes the separated stream and reproduces video and audio. The CRT 24 displays the decoded video. The control unit 25 includes a CPU and controls the entire recording / reproducing device. The PTS detecting unit 26 detects the P in the specific stream.
Extract TS. The recording / reproduction control unit 27 controls recording and reproduction of a stream on the hard disk 28. The bus 29 connects between the control unit 25 and each block, and transmits control signals and the like. The separation circuit 30 separates a stream of a specific program and related information from the stream. Switches 31, 32, and 33 switch streams.

The information to be broadcast at the same time includes video / audio coding information constituting a program, information for extracting a video / audio stream, a PCR which is a reference clock for decoding video / audio, and a program table. And detailed content information of the program.

FIG. 4 shows an example of a broadcast mode when the same program is broadcast on a plurality of channels. As shown in FIG. 4, in channel numbers 300, 400, and 500, a one-hour program with the title "movie xxx" is repeatedly broadcast. However, the broadcast start time of the program is shifted between the channels.

The operation of the recording / reproducing apparatus according to the second embodiment for recording a program broadcast in the manner shown in FIG. 4 will be described below. At a timing T2, when the user instructs recording of the channel 300, the control unit 25 determines the title of the program currently being broadcast on the channel 300, Is extracted. Next, the control unit 25 determines that the broadcast time is one hour, and transmits the title, program detailed information, and broadcast time length of the program to be broadcast from 9:00 next to the currently broadcasted time. It is compared with those of the program to determine whether they match. In this case, since they match, the control unit 25 determines that the currently broadcast program and the program broadcast from 9:00 are the same.

Further, the control unit 25 controls the channel 300
And the program length currently being broadcasted on channel 400 and the program length currently being broadcast on channel 400 and the program broadcasted at 9:20 are compared with the program length information and the program length. Further, the title of the program currently broadcast on channel 500 and the program broadcast from 9:40 are compared with the detailed program information and the program length to determine whether or not they match. In this case, since all three channels match, the control unit 25 determines that the channels 300, 400, and 500 repeatedly broadcast the same program and that the time lag between the channels is equal to 20 minutes. It is determined that the number of channels in which the head of the program appears earliest after the recording instruction is issued is 300.

Next, the control unit 25 controls the channel 300,
An identifier for separating the streams 400 and 500 is extracted from the program-related information, and the separation circuit 30
Instruct to separate the streams of 00, 400 and 500. Further, the control unit 25 switches the switch 31 to the tuner output side and the switch 33 to the ON side. further,
The control unit 25 notifies the PTS detection unit 26 of the identifier of the channel 300 where the head of the program appears earliest.
It issues a TS detection instruction.

Next, the control unit 25 determines from the program-related information
The next program start time on channel 300 is 9:00
And that the program time length is one hour,
A value obtained by converting one hour by the number of channels 3 and converting 20 minutes to a PTS value is calculated. The conversion to the PTS value is PT
Since the unit clock cycle of S is fixed, it can be easily performed. Next, the control unit 25 continuously obtains the program-related information, and monitors whether the time information included in the program-related information has reached 9:00.

The PTS detector 26 extracts the transport packet of the input video, extracts the PTS included in the header of the video stream, and notifies the controller 25 of the extracted PTS. The control unit 25 sets the extracted PTS value as the recording start time T2, and adds a PTS value obtained by dividing one hour of the program time length by the number of channels (3 in this case) to T2 to T3. And instructs the recording / reproduction control unit 27 to record the stream from time T2. Accordingly, the recording / reproduction control unit 27 starts recording the streams of the channels 300, 400, and 500 separated by the separation circuit 30 on the hard disk 28, and
The recording start position on the hard disk 28 is temporarily stored as the recording position at time T2.

When the time reaches 9:00, the control unit 25 monitoring the time included in the program-related information detects that the time has reached 9:00, and the PTS detection unit 26 immediately detects the time. The PTS value is notified to the recording / reproduction control unit 27 as T1. The recording / reproduction control unit 27 temporarily stores the stream recording position on the hard disk 28 at the timing T1 as the recording position at the time T1.

The control unit 5 calculates the time T3 which has already been calculated.
Is detected to be the same or closest to the PTS value from the PTS detection unit 26, the recording / reproduction control unit 2
7 to stop recording the stream on the hard disk 28. Further, the control unit 25 determines, based on the program-related information, the channel 300 in which the program head appears during the recording time
It is determined that the channel in which the program head occurs before the program head appearance time of the channel 500 and near the program head of the channel 300 is the channel 500, and the channel 400 next to the channel head is the channel 500, and the identifier of each channel is determined. Are arranged in the order of channels 300, 500, and 400. Finally, the reproduction information in which the identifier of the channel 300 where the head of the program occurs during the recording is arranged is created.
Notify. The recording / reproduction control unit 27 stops recording on the hard disk 28 at the timing of the time T3, determines the recording position on the hard disk 28 at the time T3, and determines the recording position at the time T1 that has already been temporarily stored and the time T2. Is recorded in the directory area of the hard disk 28.

Next, the operation of the recording / reproducing apparatus of the second embodiment for reproducing a broadcast program recorded in the above-described manner will be described. When the user issues a reproduction instruction, the control unit 25 instructs the recording / reproduction control unit 27 to perform reproduction, switches the switch 31 to the recording / reproduction control unit 27, and turns on the switch 32. The recording / reproduction control unit 27 receiving the reproduction instruction from the control unit 25 controls the hard disk 2
The reproduction control of the stream recorded in 8 is started. First, the recording / reproduction control unit 27 reads the recording position information and the reproduction information recorded in the directory area of the hard disk 28, notifies the control unit 25 of the reproduction information, and outputs the stream from the recording position of the hard disk 28 at the time T1. Are sequentially read.

Upon receiving the reproduction information from the recording / reproduction control unit 27, the control unit 25 sets the identifier of the channel 300 arranged first in the separation circuit 30. As a result, from the stream read from the hard disk 28, only the stream of the channel 300 is extracted by the separation circuit 30 and decoded by the decoder unit 23, and then displayed on the CRT 24. The recording / reproduction control unit 27 constantly monitors the reading position of the hard disk 28, and when reaching the recording position at time T3, notifies the control unit 25 that the stream reading up to time T3 has been completed.

The recording / reproduction control unit 27 continues to operate at time T2
From the recording position is started. At this time, the control unit 25 controls the channel 5 arranged next to the reproduction information.
00 is set in the separation circuit 30. As a result, from the stream read from the hard disk 28, only the stream of the channel 500 is extracted by the separation circuit 30 and decoded by the decoder unit 23, and then displayed on the CRT 24. Also, the recording / reproduction control unit 27 monitors the read position of the hard disk 28 in the same manner as described above,
The control unit 25 notifies that the stream reading up to
Notify.

The recording / reproducing control section 27 continues at time T2
From the recording position is started. At this time, the control unit 25 controls the channel 4 arranged next to the reproduction information.
00 is set in the separation circuit 30. As a result, only the stream of the channel 400 is extracted from the stream read from the hard disk 28 by the separation circuit 30, decoded by the decoder unit 23, and displayed on the CRT 24. Also, the recording / reproduction control unit 27 monitors the read position of the hard disk 28 in the same manner as described above,
The control unit 25 notifies that the stream reading up to
Notify.

The recording / reproduction control unit 27 continues to operate at time T2
From the recording position is started. At this time, the control unit 25 controls the channel 3 placed next to the reproduction information.
00 is set in the separation circuit 30. As a result, from the stream read from the hard disk 28, only the stream of the channel 300 is extracted by the separation circuit 30, decoded by the decoder unit 23, and displayed on the CRT 24. Further, the control unit 25 notifies the recording / reproduction control unit 27 that the reproduction information has become the identifier of the last channel. Accordingly, when reaching the recording position at time T1, the recording / reproduction control unit 27 stops reading from the hard disk 28.

As is clear from the above description, the stream read from the hard disk 28 and separated by the separation circuit 30 is a continuous stream of one hour from the beginning of the program, is decoded by the decoder 23, and is streamed from the beginning of the program. Displayed on CRT 24.

In the second embodiment, the PTS value detected by the PTS detector 26 is used as time information for recording / reproduction control.
A clock extraction unit for detecting a PCR is provided in place of the above. Even if a transport packet having a PCR is extracted by the clock extraction unit and the detected PCR value is used as time information, the program is recorded for 20 minutes from the middle of the program. The original one-hour program can be reconstructed and played back from the beginning. Similarly, even if the time information included in the program-related information is extracted and used as the time information, similarly, it is possible to record for 20 minutes from the middle of the program and reconstruct and reproduce the original one-hour program from the beginning of the program. it can.

In the first embodiment, since the reproduced stream is reproduced in an order different from the order of the transmitted stream, the PCR and PTS values of the reproduced stream are continuous values when shifting from time T3 to time T2. However, at the time of reproduction, the time T
By giving the PCR value and the PTS value of the second and subsequent values an offset by a value obtained by dividing the program time length by the number of channels, continuous values can be easily obtained.

(Third Embodiment) FIG. 5 shows a third embodiment of the present invention.
FIG. 3 is a block diagram illustrating a configuration of a transmission device and a recording / reproducing device according to the embodiment. In FIG. 5, the transmitting device 40
Transmits the program information to the recording / reproducing apparatus 50 via the transmission path 49. In addition, as the transmission path 49, a spatial transmission path using satellite broadcasting is generally used.

The transmitting device 40 includes a program managing unit 41, a program storing unit 42, encoders 431 to 43n, counters 451 to 45n, a multiplexing unit 47, and a transmitting unit 48. The program management unit 41 manages programs transmitted by the transmission device 40. The program storage unit 42 stores program information to be transmitted. The encoders 431 to 43n receive instructions from the transmission management unit 41 and encode the program information from the program storage unit 42. Each of the counters 451 to 45n sets the count value to 0 in response to the program head information from the program management unit 41, and increments the count value each time the encoder 431 to 43n creates a sequence header. The multiplexing unit 47 divides the coded information from the plurality of encoders 431 to 43n into transport packets and multiplexes them. The transmitting unit 48 performs modulation and up-conversion for transmitting the output of the multiplexing unit 47.

When the program information given to the corresponding encoders 431 to 43n is a portion corresponding to the head of the program, the counters 451 to 45n respectively control the program management unit 4
In response to the signal from 1, a value in which the count value is cleared to 0 is output. The encoders 431 to 43n are respectively
Counters 451 to 4 when creating sequence header
After setting the count value from 5n in the extended user area of the sequence header, the header information is encoded, and the encoded information is output to the multiplexing unit 47. Note that the encoders 431 to 43n conform to the MPEG2 standard,
A frame header is created for each frame, a GOP header is created for each GOP, and a sequence header is created for a predetermined number of GOPs. The sequence header is added to an encoding sequence layer that transmits a predetermined number of images as one unit. Further, the encoders 431 to 43n respectively
After creating the sequence header, the counters 451 to 45
A signal for incrementing the count value of n is output, and the count values of the counters 451 to 45n are incremented. As a result, the serial number in the program, which becomes 0 at the beginning of the program and is incremented for each sequence header, can be transmitted in the extended user area of the sequence header.

The recording / reproducing apparatus 50 includes a tuner 51, a separating section 52, a decoder 53, a CRT 54, and a control section 5.
5, a PTS detection unit 56, a recording / reproduction control unit 57,
A hard disk 58 and a bus 59 are provided. The separation unit 52 includes a separation circuit 60 and switches 61, 62, and 63.
And

The tuner 51 selects a program and outputs a transport stream of one transponder. Note that the recording / reproducing device may be configured to input a transport stream from an external tuner. The separating unit 52 separates the stream of the specific program and the program-related information from the multiplexed transport stream, and switches the streams. Decoder 5
3 decodes the separated stream and reproduces video and audio. The CRT 54 displays the decoded video. The control unit 55 includes a CPU and controls the entire recording / reproducing device. The header detector 56 extracts a count value, which is a serial number of a sequence unit in a program, from the extended user area of the sequence header in the specific stream. The recording / reproduction control unit 57 controls recording and reproduction of a stream on the hard disk 58. Bus 59
Connects between the control unit 55 and each block, and transmits control signals and the like. The separation circuit 60 separates a stream of a specific program and related information from the stream. Switches 61, 62, and 63 switch streams.

From the transmitting device 40 to the recording / reproducing device 50,
The video / audio coding information constituting the program, the information for extracting the video / audio stream, the PCR which is the reference clock for decoding the video / audio, the information for creating the program guide, the detailed content information of the program, etc. are simultaneously transmitted. Sent.

FIG. 6 shows an example of a broadcast mode of a program on a certain channel. As shown in FIG. 6, in channel number 300, a one-hour program with the title "movie xxx" is repeatedly broadcast.

Hereinafter, the recording / reproducing apparatus 50 shown in FIG.
However, the operation in the case of recording a program broadcast in the mode as shown in FIG. 6 will be described. At timing C2, when the user instructs recording of channel 300,
The control unit 55 extracts the title of the program currently being broadcast on the channel 300 and the detailed program information from the program-related information already acquired via the separation circuit 60. Next, the control unit 55 determines that the broadcast time is one hour, and transmits the title, program detailed information, and broadcast time length of the program whose broadcast is to be started from the next 8:00 to the currently broadcasted time. It is compared with those of the program to determine whether they match. In this case, since they match, the control unit 55 determines that the currently broadcast program and the program broadcast from 8:00 are the same.

Next, the control unit 55 extracts an identifier for separating the stream of the channel 300 from the program related information, and instructs the separation circuit 60 to separate the stream of the channel 300. Further, the controller 55 switches the switch 61 to the separation circuit output side and the switch 63 to the ON side. Further, the control unit 55 instructs the header detection unit 56 to detect the count value set in the extended user area of the sequence header. In response, the header detector 66 extracts the transport packet of the input video, extracts the count value included in the extended user area of the sequence header of the video stream, and
Notify 5

The control unit 55 temporarily stores the extracted count value as the recording start timing C2, and instructs the recording / reproduction control unit 57 to record the stream from the timing C2. In response to this, the recording / reproduction control unit 57 starts recording the stream of the channel 300 on the hard disk 58, and temporarily stores the recording start position on the hard disk as the recording position at the timing C2.

Thereafter, when the count value 0 is notified from the header detection unit 56, the control unit 55 notifies the recording / reproduction control unit 57 of the count value as timing C1.
The recording / reproduction control unit 57 temporarily stores the stream recording position on the hard disk 58 at the timing C1. Next, the control unit 55 monitors whether or not the count value notified from the header detection unit 56 matches the count value at the timing C2 temporarily stored. The recording / reproduction control unit 57 is notified as C3, and the recording is stopped. Accordingly, the recording / reproduction control unit 57 stops recording on the hard disk 58 immediately before the timing C3, determines the recording position on the hard disk 58 at the timing C3, and determines the recording position at the timing C1 that has already been temporarily stored. And the recording position at the timing C2 in the directory area of the hard disk 58.

Next, the broadcast program of the channel 300 recorded in the above-described manner is transmitted to the recording / reproducing apparatus 50 of FIG.
The operation in the case where is reproduced will be described. When the user issues a reproduction instruction, the control unit 55 instructs the recording / reproduction control unit 57 to reproduce, switches the switch 61 to the recording / reproduction control unit 57 side, and turns on the switch 62. The recording / reproduction control unit 57 that has received the reproduction instruction from the control unit 55 reads the recording position information recorded in the directory area of the hard disk 58 and determines the reproduction order of the recorded streams. Based on this determination, the recording / reproduction control unit 57
First, the stream from the recording position of the timing C1 of the hard disk 58 is sequentially read, the reading position of the hard disk 58 is monitored, and when the recording position of the timing C3 is reached, reading from the recording position of the timing C2 is continuously performed. The reading is stopped when the recording position at timing C1 is reached. The read stream is decoded by the decoder 53 and displayed on the CRT 54 in order from the beginning of the program.

In the third embodiment, since the reproduced stream is reproduced in an order different from the transmitted stream order, the PRC and PTS values of the reproduced stream are set at the timing C.
3 does not become a continuous value when transitioning to timing C2, but the PCR and PTS values after timing C2 are offset from the PCR and PTS values at timing C1 by one hour, which is the program time length, based on the PCR and PTS values at the time of reproduction. By giving it, a continuous value can be easily obtained.

(Fourth Embodiment) FIG. 7 shows a fourth embodiment of the present invention.
FIG. 3 is a block diagram illustrating a configuration of a transmission device and a recording / reproducing device according to the embodiment. In FIG. 7, the transmitting device 70
Transmits the program information to the recording / reproducing apparatus 80 via the transmission path 79. In addition, as the transmission path 79, a spatial transmission path using satellite broadcasting is generally used.

The transmitting device 70 includes a program managing unit 71, a program storing unit 72, encoders 731 to 73n, counters 751 to 75n, a multiplexing unit 77, and a transmitting unit 78. The program management unit 71 manages a program transmitted by the transmission device 70. The program storage unit 72 stores program information to be transmitted. The encoders 731 to 73n receive instructions from the transmission management unit 71 and encode program information from the program storage unit 72. Each of the counters 751 to 75n sets the count value to 0 in the program head information from the program management unit 71, and increments the count value each time the encoder 731 to 73n creates a sequence header. The multiplexing unit 77 divides the coded information from the plurality of encoders 731 to 73n into transport packets and multiplexes them. The transmitting unit 78 performs modulation for transmitting the output of the multiplexing unit 77,
Perform up-conversion.

When the program information given to the corresponding encoders 731 to 73n is a portion corresponding to the head of the program, the counters 751 to 75n respectively control the program management unit 7
In response to the signal from 1, a value in which the count value is cleared to 0 is output. The encoders 731 to 73n are respectively
When creating a sequence header, the count value 751
After setting the count value from 75n in the extended user area of the sequence header, the header information is encoded, and the encoded information is output to the multiplexing unit 77. Note that the encoders 731 to 73n are based on the MPEG2 standard,
A frame header is created for each frame, a GOP header is created for each GOP, and a sequence header is created for a predetermined number of GOPs. Further, the encoders 731 to 73n respectively include:
After creating the sequence header, the counters 751 to 75
A signal for incrementing the count value of n is output, and the count values of the counters 751 to 75n are incremented. As a result, the serial number in the program, which becomes 0 at the beginning of the program and is incremented for each sequence header, can be transmitted in the extended user area of the sequence header.

The recording / reproducing apparatus 80 includes a tuner 81, a separating section 82, a decoder 83, a CRT 84, a control section 8
5, a PTS detection unit 86, a recording / reproduction control unit 87,
A hard disk 88 and a bus 89 are provided. The separating unit 82 includes a separating circuit 90 and switches 69, 92, and 93.
And

The tuner 81 selects a program and outputs a transport stream of one transponder. Note that the recording / reproducing device may be configured to input a transport stream from an external tuner. The separating unit 82 separates the stream of the specific program and the program-related information, and switches the streams. The decoder 83 decodes the separated stream and reproduces video and audio. The CRT 84 displays the decoded video. The control unit 88 includes a CPU and controls the entire recording / reproducing device. The header detection unit 86 extracts a count value which is a serial number of a sequence unit in a program from the extended user area of the sequence header in the specific stream. The recording / reproduction control unit 87 controls recording and reproduction of a stream on the hard disk 88. The bus 89 connects the control unit 88 and each block, and transmits control signals and the like. The separating circuit 90 separates a stream of a specific program and related information from the stream. Switches 91, 92, and 93 switch streams.

From the transmitting device 70 to the recording / reproducing device 80,
The video / audio coding information constituting the program, the information for extracting the video / audio stream, the PCR which is the reference clock for decoding the video / audio, the information for creating the program guide, the detailed content information of the program, etc. are simultaneously transmitted. Sent.

FIG. 8 shows an example of a broadcast mode when the same program is broadcast on a plurality of channels. As shown in FIG. 8, in channel numbers 300, 400, and 500, a one-hour program with the title "movie xxx" is repeatedly broadcast. However, the broadcast start time of the program is shifted between the channels.

The operation of the recording / reproducing apparatus 80 shown in FIG. 7 when recording a program broadcast in the manner shown in FIG. 8 will be described below. At timing C2,
When the user instructs recording of the channel 300, the control unit 85 extracts the title of the program currently being broadcast on the channel 300 and the program detailed information from the program-related information already acquired via the separation circuit 90. Next, the control unit 85
Determines that the broadcast time is one hour, and compares the program title, detailed program information, and broadcast time length of the program that starts broadcasting at 9:00 next with those of the program currently being broadcast. To determine whether they match. In this case, since they match, the control unit 85 determines that the currently broadcast program and the program broadcast from 9:00 are the same.

Further, the control unit 85 controls the channel 300
And the program length currently being broadcast on channel 400 and the program length and the program detail information and the program length broadcast from 9:20 are compared. Further, the title of the currently broadcast program on channel 500 and the program broadcast from 9:40, the detailed program information, and the program length are compared to determine whether they match. In this case, since all three channels match, the control unit 85 determines that the channels 300, 400, and 500 repeatedly broadcast the same program and that the time lag between the channels is equal to 20 minutes. It is determined that the number of channels in which the head of the program appears earliest after the recording instruction is issued is 300.

Next, the control unit 85 converts the multiplexed transport stream into channels 300, 400, 50
An identifier for separating the stream of stream 0 is extracted from the program-related information, and the separation circuit 90 outputs the identifier to the channels 300 and 40.
Instructs to separate 0,500 streams. Further, the control unit 85 sets the switch 91 to the tuner output side,
The switch 93 is turned on. Further, the control unit 8
5 notifies the header detection unit 86 of the identifier of the channel 300 in which the head of the program appears earliest, and instructs the detection of the count value of the extended user area of the sequence header. In response, the header detection unit 86 decodes the transport packet of the input video, detects the count value included in the extended user area of the sequence header of the video stream in the channel 300, and
Notify.

The control unit 85 sets the count value detected first by the header detection unit 86 to the recording start timing C2.
And instructs the recording / reproduction control unit 87 to record the stream from timing C2. Accordingly, the recording / reproducing control unit 87 operates the channel 3 separated by the separation circuit 90.
Hard disk 8 with streams of 00, 400 and 500
8 and the recording start position on the hard disk 88 is temporarily stored as the recording position at the timing C2. Thereafter, when the count value 0 is notified from the header detection unit 86, the control unit 85 obtains a value (division result) obtained by dividing the immediately preceding count value by the number of channels (in this case, 3). If the number is not divisible, it is moved up. Further, the control unit 85 subtracts a difference value obtained by subtracting the count value detected at the recording start timing C2 from the immediately preceding count value from the division result, and temporarily stores the obtained value as a recording end timing C3. Further, since the count value becomes 0, the control unit 85 notifies the recording / reproduction control unit 87 of this as timing C1. The recording / reproduction control unit 87 temporarily stores the stream recording position on the hard disk 88 at the timing C1.

Next, the control unit 85 monitors whether or not the count value of the timing C3, which has been calculated, and the value from the header detection unit 86 are the same. The recording / reproduction control unit 87 outputs the timing C
3 and stop recording on the hard disk 88. Further, the control unit 85 determines from the program-related information that the channel on which the program head occurs before the program head on the channel 300 where the program head appears during the recording time and at a time close to the program head on the channel 300
00 and the next closest channel 400 is determined, and the identifier of each channel is
The reproduction information is arranged in the order of 0, 500, and 400, and the reproduction information in which the identifier of the channel 300 where the head of the program occurs at the end of the recording is arranged is generated, and is notified to the recording / reproduction control unit 87.
The recording / reproduction control unit 87 stops recording on the hard disk 88 immediately before the timing C3, determines the recording position on the hard disk 88 at the timing C3, and determines the recording position at the timing C1 that has already been temporarily stored and the timing. The recording position in C2 and the notified playback information are recorded in the directory area of the hard disk 88.

Next, the operation when the recording / reproducing apparatus shown in FIG. 7 reproduces a broadcast program recorded in the above-described manner will be described. When the user gives a reproduction instruction, the control unit 8
5 instructs the recording / reproduction control unit 87 to reproduce, switches the switch 91 to the recording / reproduction control unit 87 side, and switches 9
Turn 2 ON. The recording / reproduction control unit 87 that has received the reproduction instruction from the control unit 25 reads the recording position information and the reproduction information recorded in the directory area of the hard disk 88, notifies the control unit 85 of the reproduction information, and The stream from the recording position of C1 is sequentially read.

When receiving the reproduction information from the recording / reproduction control unit 87, the control unit 85 sets the identifier of the channel 300 arranged first in the separation circuit 90. Thus, only the stream of the channel 300 is extracted from the stream read from the hard disk 88 by the separation circuit 90, decoded by the decoder unit 83, and displayed on the CRT 84. The recording / reproduction control unit 87 constantly monitors the read position of the hard disk 88, and when reaching the recording position at time C3, notifies the control unit 85 that the stream reading up to time C3 has been completed.

The recording / reproducing control section 87 continuously reads from the recording position at the timing C2. At this time, the control unit 85 sets the identifier of the channel 500 arranged next to the reproduction information in the separation circuit 90. As a result, from the stream read from the hard disk 88, only the stream of the channel 500 is extracted by the separation circuit 80, decoded by the decoder unit 83, and displayed on the CRT 84. Further, the recording / reproduction control section 87 monitors the read position of the hard disk 88 in the same manner as described above,
The control unit 85 is notified that the stream reading up to the timing C3 has been completed.

The recording / reproduction control section 87 starts reading from the recording position at the timing C2. At this time, the control unit 85 sets the identifier of the channel 400 arranged next to the reproduction information in the separation circuit 30. As a result, from the stream read from the hard disk 88, only the stream of the channel 400 is extracted by the separation circuit 30 and decoded by the decoder unit 83, and then displayed on the CRT 84. Further, the recording / reproduction control unit 87 monitors the read position of the hard disk 88 in the same manner as described above,
The control unit 85 is notified that the stream reading up to the timing C3 has been completed.

The recording / reproduction control section 87 starts reading from the recording position at the timing C2. At this time, the control unit 85 sets the identifier of the channel 300 arranged next to the reproduction information in the separation circuit 90. As a result, from the stream read from the hard disk 88, only the stream of the channel 300 is extracted by the separation circuit 90, decoded by the decoder unit 83, and displayed on the CRT 84. Further, the control unit 85
The recording / reproduction control unit 87 is notified that the reproduction information has become the identifier separation of the last channel. In response, the recording / reproduction control unit 87 stops reading from the hard disk 88 when the recording position at the timing C1 is reached.

As is clear from the above description, the stream read from the hard disk 88 and separated by the separation circuit 90 is a continuous stream for one hour from the beginning of the program, is decoded by the decoder 83, and is streamed from the beginning of the program. Displayed on CRT 84.

In the fourth embodiment, since the reproduction is performed in an order different from the order of the transmitted streams, the PCR and PTS values of the reproduced stream are continuous when shifting from timing C33 to timing C2. Although it does not become a value, the PCR, PTS
PCR value after the timing C2, PT
By giving the S value an offset corresponding to the value obtained by dividing the program time length by the number of channels, a continuous value can be easily obtained.

[Brief description of the drawings]

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

FIG. 2 is a diagram showing an example of a broadcast mode of a program on a certain channel.

FIG. 3 is a block diagram illustrating a configuration of a recording and reproducing device according to a second embodiment of the present invention.

FIG. 4 is a diagram illustrating an example of a broadcast mode when the same program is broadcast on a plurality of channels.

FIG. 5 is a block diagram illustrating a configuration of a transmitting device and a recording / reproducing device according to a third embodiment of the present invention.

FIG. 6 is a diagram showing an example of a broadcast mode of a program on a certain channel.

FIG. 7 is a block diagram illustrating a configuration of a transmitting device and a recording / reproducing device according to a fourth embodiment of the present invention.

FIG. 8 is a diagram illustrating an example of a broadcast mode when the same program is broadcast on a plurality of channels.

[Description of Codes] 1,21,51,81 Tuners 2,22,52,82 Separating Units 3,23,53,83 Decoders 4,24,54,84 CRTs 5,25,55,85 ... Control unit 6, 26, 56, 86 PTS detection unit 7, 27, 57, 87 Recording / reproduction control unit 8, 28, 58, 88 Hard disk 9, 29, 59, 89 Control bus 10, 30, 60 , 90 ... Separation circuits 11-13, 31-33, 61-63, 91-93 ... Switches 41, 71 ... Program management units 42, 72 ... Program storage units 431-43n, 731-73n ... Encoders 451-45n, 751 ~ 75n ... Counter 47,77 ... Multiplexer 48,78 ... Transmitter 49,79 ... Transmission path

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yohei Kawabata 1006 Kadoma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. F term (reference) 5C052 AA01 AB02 CC11 DD00 EE03 5C053 FA20 FA23 FA28 GA11 GB06 GB21 JA22 LA06

Claims (16)

[Claims] 1. A recording / reproducing apparatus for recording and reproducing information of various programs sent by digital broadcast, comprising: a recording unit including a predetermined recording medium; and wherein the digital broadcast continuously repeats the same program. When the recording start of the repeatedly broadcasted program is instructed when a predetermined channel to be broadcasted is included,
The current time T2, the next repetition start time T1 and the program time length of the program to be repeatedly broadcast, and the current time T2
Time detecting means for detecting a recording end time T3 obtained by adding a program time length to the program time length;
A recording control unit that records a transport stream of the digital broadcast including at least the stream of the predetermined channel in the recording unit during a time period from the current time T2 to the recording end time T3; Recording position storage means for storing respective recording positions on the recording means at the repetition start time T1 and the recording end time T3; and when the reproduction start of the repeatedly broadcasted program is instructed, the recording position storage is performed. By referring to the various recording positions stored in the recording unit, the recording unit reproduces the transport stream existing from the recording position at the repetition start time T1 to the recording position at the recording end time T3. The recording position of the repetition start time T1 from the recording position of the current time T2 And a reproduction control means for reproducing the transport stream present in in a recording and reproducing apparatus. 2. Separating means for separating and extracting at least program-related information from a transport stream of the digital broadcast, and the digital broadcast continuously and repeatedly broadcasts the same program based on the program-related information. Determining means for determining whether or not the digital broadcast includes the predetermined channel, wherein the time detecting means determines whether or not the digital broadcast includes the predetermined channel. 2. The recording / reproducing apparatus according to claim 1, wherein the repetition start time T1 and the program time length are detected based on information. 3. The separation unit further separates and extracts a stream of each channel from a transport stream of the digital broadcast, and the recording control unit is configured to identify the predetermined channel from the program-related information. By extracting an identifier and setting the identifier in the separating unit, the stream of the predetermined channel is separated, and as a result, the separated stream of the predetermined channel is recorded in the recording unit. The recording / reproducing apparatus according to claim 2, which performs the operation. 4. The separating means further separates and extracts PCRs transmitted from the transport stream of the digital broadcast at fixed time intervals and serving as a reference time for decoding a program. The time detecting means converts the repetition start time T1, the current time T2, and the recording end time T3 into corresponding PCR values, respectively; 4. The recording / reproducing apparatus according to claim 3, wherein a recording timing of the stream of the predetermined channel is controlled by comparing a value with a real-time PCR separated by the separating unit. 5. A PT for detecting a PTS value included in a stream of a specific channel separated by the separation means and transmitted for each predetermined number of video frames.
Further comprising an S detection unit, wherein the time detection unit converts the repetition start time T1, the current time T2, and the recording end time T3 into corresponding PTS values, respectively, and the recording control unit 4. The recording / reproducing apparatus according to claim 3, wherein a recording timing of the stream of the predetermined channel is controlled by comparing the converted various PTS values with a real-time PTS detected by the PTS detecting means. apparatus. 6. A recording / reproducing apparatus for recording and reproducing information of various programs sent by digital broadcasting, comprising: a recording unit including a predetermined recording medium; When n (n is a natural number of 2 or more) channels that are repeatedly broadcast are included, and the broadcast start times of these n channels are deviated from each other by a certain time, if the program to be repeatedly broadcast is When the start of recording is instructed, the current time T2, the repetition start time T1 of the program that appears earliest after the current time T2 and the time length of the program, and the time length of the program are divided by 1 / n to obtain the current time T2.
A time detecting means for detecting a recording end time T3 obtained by adding 2 to the data, and when various times are detected by the time detecting means,
During a time period from the current time T2 to the recording end time T3, a recording control unit that records a transport stream of the digital broadcast including at least the stream of the n channels in the recording unit; Recording position storage means for storing respective recording positions on the recording means at the repetition start time T1 and the recording end time T3; and when the reproduction start of the repeatedly broadcasted program is instructed, the recording position By referring to the various recording positions stored in the storage unit, the recording unit first reproduces the transport stream existing from the recording position at the repetition start time T1 to the recording position at the recording end time T3. From the recording position at the current time T2 to the recording position at the recording end time T3. Recording control means for repeatedly reproducing the existing transport stream n-1 times and reproducing the transport stream existing from the recording position at the current time T2 to the recording position at the repetition start time T1. Playback device. 7. Program-related information separating means for separating and extracting at least program-related information from a transport stream of the digital broadcast; and the digital broadcast includes the n channels based on the program-related information. A determination unit for determining whether the digital broadcast includes the n channels. When the determination unit determines that the digital broadcast includes the n channels, based on the program-related information, 7. The recording / reproducing apparatus according to claim 6, wherein the repetition start time T1 and the program time length are detected. 8. An identifier for identifying the stream of the n channels is extracted from the program-related information, and the time at which the head of the program of each channel appears starting from the repetition head time T1 is temporally past. A playback information creating unit that creates playback information in which the identifiers of the respective channels are arranged in that order and stores the playback information in a predetermined location, and the digital broadcast read from the recording unit. Stream separation means for separating and extracting the stream of each channel from the transport stream of the above, wherein the playback control means refers to the stored playback information to determine the identifiers of the n channels in the order of their arrangement. According to the above and individually set in the stream separating means in a time series, so that the channels to be reproduced at that time are Characterized in that to separate a stream of tunnel, recording and reproducing apparatus according to claim 7. 9. The program-related information separating means further separates a PCR transmitted from the transport stream of the digital broadcast at a fixed time interval and serving as a reference time for decoding a program. The time detecting means converts the repetition start time T1, the current time T2, and the recording end time T3 into corresponding PCR values, respectively, and the recording control means converts the time by the time detecting means. 8. The recording / reproducing apparatus according to claim 7, wherein the recording timing of the transport stream is controlled by comparing the various PCR values obtained with the real-time PCR separated by the separating unit. 10. A PT included in a stream of each channel in a transport stream of the digital broadcast and transmitted every predetermined number of video frames.
PTS detection means for detecting an S value, wherein the time detection means converts the repetition start time T1, the current time T2, and the recording end time T3 into corresponding PTS values, respectively, 7. The recording timing of the transport stream is controlled by comparing various PTS values converted by the time detection with a real-time PTS detected by the PTS detecting means. Recording and playback device. 11. An apparatus for transmitting a digital broadcast having a channel for continuously and repeatedly broadcasting the same program, comprising: encoding means for encoding input program information; The encoding unit includes a counter unit that sets a count value to 0 when encoding, increments the count value each time the encoding unit creates a sequence header, and a transmission unit that transmits an encoded output from the encoding unit. Transmitting the sequence header, when inserting the sequence header, inserting the count value of the counter into an extended user area of the sequence header. 12. A recording / reproducing apparatus for recording and reproducing information of various programs transmitted by digital broadcasting, wherein the digital broadcasting includes a predetermined channel for broadcasting the same program continuously and repeatedly. In the extended user area of the sequence header included in the stream of the predetermined channel, a count value that is 0 at the beginning of the program and is incremented each time the sequence header appears is inserted. Recording means including a predetermined recording medium; separating means for separating and extracting at least program-related information and a stream of each channel from the transport stream of the digital broadcast; and recording start of the repeatedly broadcasted program. , The stream of the predetermined channel is identified from the program-related information. An identifier for extracting and setting an identifier for the separation means, and separating and extracting the stream of the predetermined channel; and a stream of the predetermined header separated from the stream of the predetermined channel separated by the separation means. Header detection means for detecting the count value stored in the user area; and, after the recording start of the repeatedly broadcasted program is instructed, the time when the count value is first detected by the header detection means is used as a starting point. Until the same count value is detected again, recording control means for recording the stream of the predetermined channel separated by the separation means on the recording means, and recording of the stream of the predetermined channel by the recording control means The timing at which recording is started is referred to as recording start timing C2.
When the timing at which the header detection means detects the count value 0 is the repetition start timing C1, and the timing at which the recording control means finishes recording the stream of the predetermined channel is the recording end timing C3, Recording position storage means for storing the recording position of the stream on the recording means at timing C2, repetition start timing C1 and recording end timing C3; and when the reproduction start of the repeatedly broadcasted program is instructed, the recording is performed. By referring to the various recording positions stored in the position storage unit, the recording unit first reproduces the stream existing from the recording position at the repetition start timing C1 to the recording position at the recording end timing C3. Recording position at the recording start timing C2 And a playback control means for playing back a stream existing from the position to the recording position of the repetition start timing C1. 13. The apparatus according to claim 11, further comprising: a determination unit configured to determine whether the predetermined channel is included in the digital broadcast based on the program-related information separated by the separation unit. In response to determining that the predetermined channel is included in the digital broadcast,
13. The recording / reproducing apparatus according to claim 12, wherein an identifier setting operation is performed on the separation unit. 14. A recording / reproducing apparatus for recording and reproducing information of various programs transmitted by digital broadcasting, wherein each of the digital broadcasts continuously and repeatedly broadcasts the same program. It includes n (n is a natural number of 2 or more) channels whose broadcast start time is shifted by a predetermined time, and further extends the sequence header included in each stream of these n channels. In the user area, a count value that is 0 at the beginning of the program and is incremented each time a sequence header appears thereafter is inserted, a recording unit including a predetermined recording medium, and a transport of the digital broadcast. Separating means for separating and extracting at least program-related information and a stream of each channel from the stream; When the start of recording of the program to be broadcasted repeatedly is instructed, an identifier for identifying the stream of the n channels is extracted from the program-related information and set in the separating means, and the identifier of the n channels is set. Identifier setting means for separating and extracting a stream; header detecting means for detecting a count value stored in an extended user area of a sequence header from the stream separated by the separating means; and recording of the repeatedly broadcasted program When the start is instructed, a channel in which the next repetition head timing of the program appears earliest is detected from the n channels based on the program-related information, and the detected channel is included in the stream of the detected channel. The header detection means is instructed to detect the count value to be detected, and the separation is performed by the separation means. A recording start control unit for causing the recording unit to start recording of the stream of the n channels, and a count value detected by the header detection unit, and after the recording start of the repeatedly broadcasted program is instructed, The count value detected first is Kf, the count value detected immediately before the count value becomes 0 is Kmax,
Assuming that the current count value is Kt, a value Kx calculated by the following equation Kx = (Kmax / n)-(Kmax-Kf) is calculated, and when Kt = Kx is satisfied, the n pieces to the recording means are calculated. Count value monitoring means for stopping the recording of the stream of the channel, and the timing at which the recording means has started recording the stream of the n channels is a recording start timing C2, and the header detection means has detected the count value of 0. When the timing is the repetition start timing C1 and the timing at which the recording means ends recording the streams of the n channels is the recording end timing C3, the recording start timing C2, the repetition start timing C1, and the recording end timing C3 Recording the recording position of the stream on the recording means When the start of reproduction of the repeatedly broadcasted program is instructed, the recording means refers to the various recording positions stored in the recording position storage means, so that the recording means The stream existing from the recording position to the recording position at the recording end time C3 is reproduced, and then the stream existing from the recording position at the recording start timing C2 to the recording position at the recording end time C3 is repeated n-1 times. Playback control means for playing back a stream existing from the recording position at the recording start timing C2 to the recording position at the repetition start time C1. 15. When the times at which the heads of the programs of the n channels appear starting from the repetition head time C1 are sequentially arranged in time retroactively, the n extracted by the identifier setting means is obtained. Reproduction information generating means for generating reproduction information in which identifiers of the number of channels are arranged in the order and storing the reproduction information in a predetermined location; and a stream of each channel from the streams of the n channels read from the recording means. Stream separation means for individually separating and extracting the n channel identifiers, wherein the playback control means individually refers to the stored playback information and individually picks up the identifiers of the n channels in accordance with the order of their arrangement. By setting the stream separating means in time series, the stream of the channel to be reproduced at that time is separated. Wherein, the recording and reproducing apparatus according to claim 14. 16. The apparatus according to claim 16, further comprising: a determination unit configured to determine whether the digital broadcast includes the n channels based on the program-related information separated by the separation unit. In response to determining that the digital broadcast includes the n channels,
15. The recording / reproducing apparatus according to claim 14, wherein an operation of setting an identifier to the separation unit is performed.