JP2001057669A - Recording and reproducing device, video stream recording and reproducing device and medium for mpeg - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve convenience by adding additional information on a program detected from a prescribed signal reproduced from a first recording means to a prescribed signal so as to reduce waiting time until viewing of AV data becomes possible. SOLUTION: A reproduction control means 4 reads a signal MPEG-TS recorded in a recording means 3 to output to a PSI adding means 5. A PSI detection means 1 outputs PSI data to the means 5. Upon receiving MPEG-TS from the means 4 and the input of the PSI data from the means 1, respectively, the means 5 adds the PSI data to the top of the signal MPEG-TS. The means 5 execute adding by working the values of the circulating counters of PSAT, PMT and CAT constituting the PSI data so as to keep continuity with respect to the values of the respective circulating counters of PAT, PMT and CAT constituting PSI detected in advance.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a recording and reproducing apparatus,
The present invention relates to a PEG video stream recording / reproducing apparatus and the like.

[0002]

2. Description of the Related Art Conventionally, MPEG (Moving Picture E)
The technology of signal compression according to the (xperts Group) standard is used in various fields, and is applied to, for example, an AV data recording / reproducing apparatus.

FIG. 10A is a diagram showing a general configuration example of a decoder for video / audio data (hereinafter, referred to as AV data) compressed in the form of an MPEG transport stream (hereinafter, MPEG-TS). It is.

[0004] As shown in FIG.
0, the transport decoder 110
This is a means for receiving the input of the G-TS. The AV data decoder 120 is a means for receiving an output from the transport decoder 110, and the frame buffer 130 is a means for accessing the AV data decoder 120 and reproducing the AV data in a form that can be displayed on a display.

Next, FIG. 10B is a diagram showing a procedure of decoding and reproducing the MPEG-TS with time being on the horizontal axis, and FIG. 11A is a diagram showing a configuration of the MPEG-TS. FIG. 11B is a diagram showing a configuration of a video stream in the AV bit stream. Hereinafter, the decoding and reproducing operations of the MPEG-TS by the AV decoder 100 will be described with reference to the drawings.

First, when an MPEG-TS is input to the transport decoder 110, the transport decoder 110 detects a PAT from the input MPEG-TS as a step shown in FIG.
Here, PAT (Program Association Table) means MP
The EG-TS includes a program number assigned to a program recorded in the MPEG-TS and a PMT (Program Mat Table) indicating an ID of a packet transmitting a stream of AV data or the like constituting the program. These packets are scattered in the MPEG-TS as shown in FIG. The PMT also exists as a packet in MPEG-TS.

The transport decoder 110 has a PAT
Is detected, then the PMT is detected as a step shown in (b) of FIG. 10 (b). In some cases, PAT, PMT
CAT (Conditional Access Table)
Is performed. A used for pay broadcasting
The V data is scrambled in advance so that ordinary viewers without a dedicated decoder cannot view the data. The CAT indicates the ID of a packet that transmits decryption information for descrambling the scrambled data. Yes, M
It exists as a packet in the PEG-TS.

The program specification information such as PAT, PMT and CAT are collectively referred to as PSI (Program Specific Information).
ation), and therefore (a) and (b) in FIG.
It can be said that the operation of the transport decoder 110 as shown in (c) detects PSI.

[0009] The transport decoder 110
The MPEG-TS in which the SI has been detected is input to the AV data decoder 120 as an AV bit stream. A
The V data decoder 120 decodes a video stream from the input MPEG-TS. As shown in FIG. 11B, in the MPEG bit stream, the video stream is composed of video frames of I frame, B frame, and P frame.
Of these video frames, the first to be decoded is the I frame. Therefore, the AV data decoder 120 first detects an I frame as shown in steps (d) of FIGS. 10B and 11B. When the I frame is detected, the I frame
With the frame as a starting point, a video stream is decoded from the MPEG-TS (step (e) in the figure). The decoded AV data is output to the frame buffer.

The frame buffer receives the input of the AV data from the AV data decoder, accumulates a certain amount of the data (steps in FIGS. 10B and 10F), and outputs the data to a display device such as a display. .

[0011]

By the way, according to the above operation, from the start of the decoding of the MPEG transport stream until the actual display of the AV data,
It takes less than 2 seconds. This is MPEG-
This is due to the operation of decoding TS into normal AV data, and the time is divided into the following two. One is the time required to detect PSI in the transport decoder (PSI reception waiting time), and the other is the time required to detect an I frame in the AV decoder (ISI).
Frame reception waiting time).

The time required for detecting these PSIs and I
The time required for frame detection is perceived by a user of the MPEG transport stream reproducing apparatus as a waiting time from when the reproducing operation is performed to when the AV data can be actually viewed, which is a problem in convenience. Was.

The present invention has been made in view of such a problem, and has been made to actually perform the operation of starting reproduction.
It is an object of the present invention to provide an MPEG transport stream recording / reproducing apparatus and an MPEG video stream recording / reproducing apparatus in which the waiting time until AV data can be viewed is shortened and convenience is improved.

[0014]

According to a first aspect of the present invention, there is provided a first recording means for recording a predetermined signal discretely containing additional information of a program, Recording control means for recording the predetermined signal in the first recording means, reproduction control means for reproducing the predetermined signal from the first recording means, and detecting additional information of the program from the predetermined signal The recording / reproducing apparatus further includes an additional information I detecting unit for adding the additional information to the predetermined signal.

According to a second aspect of the present invention, a first recording means for recording a predetermined signal discretely containing additional information of a program, and the predetermined signal is recorded on the first recording means. A recording control unit for causing the first recording unit to reproduce the predetermined signal; a program specific information (hereinafter, PSI) or SI (Service Information, hereinafter, S) based on the predetermined signal.
PSI or SI detecting means for detecting I);
Or a PSI or SI adding means for adding SI to the predetermined signal.

Further, a third aspect of the present invention provides a sixth recording means for recording an MPEG video stream; a recording control means for causing the sixth recording means to record the MPEG video stream; Reproduction control means for reproducing the MPEG video stream from recording means;
I frame position information detecting means for detecting the position of the I frame in the G video stream as I frame position information, and I frame position information managing means for managing the I frame position information, the reproduction control means, An MPEG video stream recording / reproducing apparatus characterized by acquiring I-frame position information from the I-frame position information management means and reproducing an MPEG video stream based on the I-frame position information based on the I-frame position information.

According to a fourth aspect of the present invention, there is provided a first recording means for recording an MPEG transport stream,
Recording control means for recording the MPEG transport stream on the first recording means, reproduction control means for reproducing the MPEG transport stream from the first recording means, and PCR (Program Clock) from the MPEG transport stream. Reference, hereinafter P
A recording / reproducing apparatus comprising: a PCR detection unit for detecting a CR); and a PCR addition unit for adding the PCR to the MPEG transport stream.

[0018]

(Embodiment 1) FIG. 1 is a diagram showing a configuration of an MPEG transport stream recording / reproducing apparatus according to Embodiment 1 of the present invention. As shown in the figure, M
In the PEG transport stream recording / reproducing device 10, the PSI detecting means 1 and the recording control means 2
This is a means for directly receiving the input of the EG transport stream (MPEG-TS). The recording unit 3 records the MPEG-TS under the control of the recording control unit 2.
This means has a random access function such as DD.
The reproduction control unit 4 is configured to store the MPEG-
This is a means for reproducing the TS. Also, PSI adding means 5
Is a means for receiving an input from the PSI detection means 1 and the reproduction control means 4 and outputting an MPEG-TS to the outside of the MPEG transport stream recording / reproduction device 10.

The first embodiment having the above configuration will be described below.

First, the recording operation will be described. When the recording control means 2 starts the operation of recording the MPEG-TS, the input of the MPEG-TS is performed from the outside,
The MPEG-TS is input to both the PSI detection means 1 and the recording control means 2. The recording control means 2 uses MPEG
When the input of the TS is received, this is recorded in the recording means 3. In the recording means 3, the MPEG-TS is stored as stored data.

On the other hand, the PSI detecting means 1 uses the MPEG-T
When the input of S is received, from each packet constituting the
The PAT, PMT, and CAT, which are packets constituting the PSI, are detected, and these are recorded as PSI data. Here, the PSI data is obtained by arranging packets constituting the PSI in a predetermined order such as PAT at the beginning, PMT at the end, and CAT at the end. Further, when detecting the PSI data, the PSI detecting means 1 simultaneously detects the value of the cyclic counter of each of the PAT, PMT, and CAT. Here, the cyclic counter is MP including PAT, PMT and CAT.
In various packets constituting the EG-TS, 0 to 15
MPEG-TS is reproduced by continuously detecting this value.

As described above, in the recording operation, the MPEG-TS is recorded in the recording means 3 and the PSI data is recorded in the PSI detecting means 1, respectively.

Next, the reproducing operation will be described. The reproduction control unit 4 is configured to store the MPEG-T recorded on the recording unit 3.
S is read out and output to the PSI adding means 5. Also, P
SI detecting means 1 outputs PSI data to PSI adding means 5.

When receiving the MPEG-TS from the playback control unit 4 and the PSI data from the PSI detection unit 1, the PSI adding unit 5 adds the PS-PS to the beginning of the MPEG-TS.
I data is added. At this time, the PSI adding means 5
The value of the cyclic counter of PAT, PMT and CAT constituting the PSI data is the value of P which constitutes the previously detected PSI.
The values of the AT, PMT and CAT cyclic counters are processed and added to maintain continuity.

The MPEG-TS to which PSI data is added at the beginning as described above is output to the outside of the MPEG transport stream recording / reproducing apparatus 10.

The reproduced MPEG-TS is a conventional MP-TS.
Decoding is performed by the EG-TS decoder. At this time, as shown in FIG. 2A, PAT, PM, which is PSI in the form of PSI data, is placed at the beginning of the MPEG-TS.
Since T and CAT have been provided, the decoder will process these data first. Therefore, the decoder does not need to perform an operation for detecting PMT, PAT, and the like, and the time for that is saved.

As described above, according to the MPEG transport stream recording and reproducing apparatus of the first embodiment, the MPE
MPEG-T recorded in advance when recording G-TS
The PSI included in the S is detected as PSI data, and is added to the beginning of the MPEG-TS to be reproduced at the time of reproduction, so that the operation of PSI detection by the decoder at the time of decoding is omitted, and the preparation required for reproduction is performed. Time can be shortened as a whole.

In the above description, each packet of PAT, PMT and CAT constituting PSI is described as being a single packet. However, each of PAT, PMT and CAT is composed of a plurality of packets. In some cases. In this case, the PSI
The detecting means 1 detects PAT, PMT,
And the cyclic counter value of the CAT as well as the arrangement order of these packets are detected at the same time.
Is added to the MPEG-TS so as to maintain the continuity of the packet arrangement order, similarly to the cyclic counter value.

As a method of maintaining the continuity of the cyclic counter value, the cyclic counter value of the PSI data to be added is rewritten according to the cyclic counter value of each PSI originally included in the MPEG-TS. Alternatively, each PSI originally included in the MPEG-TS may be replaced according to the cyclic counter value of the PSI data to be added. In particular, this rewriting is realized by replacing all the PSI included in the original MPEG-TS with the PSI data in which the cyclic counter value is continuously changed. (Embodiment 2) FIG. 2 shows an MPE according to Embodiment 2 of the present invention.
FIG. 2 is a diagram illustrating a configuration of a G transport stream recording / playback device. As shown in the figure, in the MPEG transport stream recording / reproducing apparatus 20, the same reference numerals as those in FIG. 1 denote the same parts, the PSI detecting means 1 is provided on the reproducing side, and the reproducing control means 4 comprises the PSI adding means 5 Output is performed to both the PSI detection means 1, and the PSI addition means 5 receives inputs from the reproduction control means 4 and the PSI detection means 1.

The second embodiment having the above configuration will be described below.

First, the recording operation will be described. When the recording control means 2 starts the operation of recording the MPEG-TS, the input of the MPEG-TS is performed from the outside,
The MPEG-TS is input to the recording control means 2. When receiving the input of the MPEG-TS, the recording control unit 2 records this in the recording unit 3. As in the first embodiment, the recording unit 3 stores the MPEG-TS as stored data.

Next, the reproducing operation will be described. The reproduction control unit 4 is configured to store the MPEG-TS recorded on the recording unit 3.
And PSI adding means 5 and PSI detecting means 1
Output to

When receiving the input of the MPEG-TS, the PSI detecting means 1 performs the PS
I is detected as PSI data together with the value of the cyclic counter, and is output to the PSI adding means 5.

When receiving the MPEG-TS from the playback control unit 4 and the PSI data from the PSI detection unit 1, the PSI adding unit 5 maintains the continuity of the cyclic counter value at the beginning of the MPEG-TS. The PSI data is added and output to the outside of the MPEG transport stream recording / reproducing device 10.

As described above, according to the MPEG transport stream recording and reproducing apparatus of the second embodiment, the MPE
When playing back a G-TS, the PSI included in the MPEG-TS
Is detected as PSI data and added to the beginning of the MPEG-TS, so that it is not necessary to record the PSI data from the PSI detecting means, and the MPEG-T
The preparation time required for the regeneration of S can be shortened as a whole.

As in the first embodiment, in the above description, PAT, PMT and C
Although the description has been made assuming that each packet of the AT is a single packet, PAT, PMT and CAT
May be composed of a plurality of packets. In this case, when detecting the PSI, the PSI detecting means 1 simultaneously detects the arrangement order of the plurality of packets together with the cyclic counter values of PAT, PMT and CAT. And MPEG-T to maintain the continuity of the packet arrangement order.
S is added.

As a method of maintaining the continuity of the cyclic counter value, the cyclic counter value of the PSI data to be added is rewritten according to the cyclic counter value of each PSI originally included in the MPEG-TS. Alternatively, each PSI originally included in the MPEG-TS may be replaced according to the cyclic counter value of the PSI data to be added. (Embodiment 3) FIG. 3 shows an MPE according to Embodiment 3 of the present invention.
FIG. 2 is a diagram illustrating a configuration of a G transport stream recording / playback device. As shown in the figure, in the MPEG transport stream recording / reproducing apparatus 30, the same numbers as those in FIG. 1 denote the same parts, and the PSI adding means 5
And PSI data to the recording control means 2 in response to an input from

The third embodiment having the above configuration will be described below.

First, the recording operation will be described. When the recording control means 2 starts the operation of recording the MPEG-TS, the input of the MPEG-TS is performed from the outside,
The MPEG-TS is input to both the PSI detection means 1 and the recording control means 2.

Next, the PSI detecting means 1 checks whether the MPEG-T
When S is input, P
The SI is detected together with the value of the cyclic counter and output to the PSI adding means 5 as PSI data. When receiving the input of the PSI data, the PSI adding means 5 outputs the PSI data to the recording control means 2, and outputs the MPEG-
At the beginning of the TS, PSI data is added so that the MPEG-TS input so far and the value of the cyclic counter are continuous.

The recording control means 2 receives the input of the MPEG-TS.
SI data is added. That is, the recording control unit 2
Records the MPEG-TS to which PSI data is added at the head in the recording means 3.

Next, the reproduction operation is performed according to the conventional MPEG-TS
As in the case of the recording / reproducing apparatus, the recording is performed by reading the MPEG-TS from the recording means 3 under the control of the reproduction control means 4. However, the MPE recorded in the recording means 3
Since the G-TS has PSI data already added to its head, no extra PSI detection operation is performed during decoding, as in the first and second embodiments.

As described above, according to the third embodiment, the operation of PSI detection by the decoder at the time of decoding is omitted.
Preparation time required for reproduction can be shortened as a whole.

Further, M stored in the recording means 3 in advance
By adding PSI data at the stage of PEG-TS, it is possible to reduce the processing load on the apparatus during reproduction.

As in the first embodiment, in the above description, PAT, PMT and C
Although the description has been made assuming that each packet of the AT is a single packet, PAT, PMT and CAT
May be composed of a plurality of packets. In this case, when detecting the PSI, the PSI detecting means 1 simultaneously detects the arrangement order of the plurality of packets together with the cyclic counter values of PAT, PMT and CAT. And MPEG-T to maintain the continuity of the packet arrangement order.
S is added.

As a method of maintaining the continuity of the cyclic counter value, the cyclic counter value of the PSI data to be added is rewritten according to the cyclic counter value of each PSI originally included in the MPEG-TS. Alternatively, each PSI originally included in the MPEG-TS may be replaced according to the cyclic counter value of the PSI data to be added. In particular, this rewriting is realized by replacing all the PSI included in the original MPEG-TS with the PSI data in which the cyclic counter value is continuously changed. (Embodiment 4) FIG. 4 is a diagram showing a configuration of an MPEG transport stream recording / reproducing apparatus according to Embodiment 4 of the present invention. As shown in the figure, in the MPEG transport stream recording / reproducing apparatus 40, the same reference numerals as those in FIG. 1 denote the same parts, and the PSI position information management means 6 is a means arranged between the PSI detection means 1 and the reproduction control means 4. It is.

The fourth embodiment having the above configuration will be described below.

First, the recording operation will be described. When the recording control means 2 starts the operation of recording the MPEG-TS, the input of the MPEG-TS is performed from the outside,
The MPEG-TS inputs this to both the PSI detecting means 1 and the recording control means 2.

Next, the PSI detecting means 1 checks whether the MPEG-T
When S is input, P
The SI is detected together with the value of the cyclic counter and output to the recording control means 2 as PSI data.

The recording control means 2 comprises an MPEG-TS,
When the input of the SI data is received, these are stored in the recording means 3. At this time, the PSI position information management means 6 accesses the recording control means 2, and the recording control means 2
The position in the recording means where the data was recorded is acquired as PSI position information.

In the above recording operation, the recording means 3
This means that the G-TS and the PSI data are stored, and the PSI position information management means 6 stores the PSI position information.

Next, the reproducing operation will be described. The reproduction control unit 4 is configured to store the MPEG-T recorded on the recording unit 3.
Read S and PSI data. However, at this stage, the MPEG-TS and the PSI data are output as uniform digital data without distinction of the contents.

Next, the PSI position information management means 6 accesses the reproduction control means 4 and converts the digital data being processed by the reproduction control means 4 into PSI based on the PSI position information.
Detect where data is recorded. Then PSI
When detecting the location of the PSI data, the location information management means 6 extracts the PSI data from the location and adds it to the beginning of the MPEG-TS in the original digital data so as to maintain the continuity of the value of the cyclic counter. , So that the transport stream is continuous with the MPEG-TS input so far.

Finally, the reproduction control means 4 adds the PSI data to the head and modifies the MPEG
-Output the TS to the outside of the MPEG transport stream recording / reproducing device 10.

As described above, according to the MPEG transport stream recording / reproducing apparatus of the fourth embodiment, the MPE
When playing back a G-TS, the PSI included in the MPEG-TS
Is detected as PSI data and added to the beginning of the MPEG-TS, so that it is not necessary to record the PSI data from the PSI detecting means, and the MPEG-T
The preparation time required for reproducing S can be shortened as a whole, and the convenience of data management can be improved by storing the PSI data in the recording means.

As in the first embodiment, in the above description, PAT, PMT and C
Although the description has been made assuming that each packet of the AT is a single packet, PAT, PMT and CAT
May be composed of a plurality of packets. In this case, when detecting the PSI, the PSI detecting means 1 simultaneously detects the arrangement order of the plurality of packets together with the cyclic counter values of PAT, PMT and CAT. Similarly to the above, MP
Addition to EG-TS.

As a method of maintaining the continuity of the cyclic counter value, the cyclic counter value of the PSI data to be added is rewritten according to the cyclic counter value of each PSI originally included in the MPEG-TS. Alternatively, each PSI originally included in the MPEG-TS may be replaced according to the cyclic counter value of the PSI data to be added. (Embodiment 5) FIG. 5 is a diagram showing a configuration of an MPEG transport stream recording / reproducing apparatus according to Embodiment 5 of the present invention. As shown in the figure, in the MPEG transport stream recording / reproducing apparatus 50, the same reference numerals as those in FIGS. 1 and 4 denote the same parts, but the PSI detecting means 1 and the PSI position information managing means 6 4 is connected so as to create a path different from the path of the MPEG-TS.

The fourth embodiment having the above configuration will be described below.

First, the recording operation will be described. When the recording control means 2 starts the operation of recording the MPEG-TS, the input of the MPEG-TS is performed from the outside,
The MPEG-TS inputs this to the recording control means 2. When the recording means 3 receives the input of the MPEG-TS,
This is recorded in the recording means 3. The operation so far is the same as the operation of the conventional MPEG-TS recording / reproducing apparatus.

Next, the PSI detecting means 1 accesses the recording means 3 to read the MPEG data stored in the recording means 3.
-The PSI is detected from the TS together with the value of the cyclic counter and is written to the recording means 3 as PSI data, and the position in the recording means 3 where the PSI data is stored is detected, and this position is determined. As PSI location information,
The information is input to the PSI position information management means 6. The PSI position information management means stores the input PSI position information.

Next, the reproducing operation will be described. The reproduction control unit 4 is configured to store the MPEG-T recorded on the recording unit 3.
Read S. On the other hand, the PSI position information management means 6 accesses the reproduction means 3 and detects the place where the PSI data is recorded from the MPWG-TS being processed by the reproduction control means 4 based on the PSI position information, PS from the place
Take out the I data and find the MP in the original digital data
The EG-TS is added to the beginning of the EG-TS so as to maintain the continuity of the value of the cyclic counter, so that the transport stream is continuous with the MPEG-TS input so far.

Lastly, the reproduction control means 4 adds the PSI data to the head, and modifies the MPEG-
The TS is output to the outside of the MPEG transport stream recording / reproducing device 10.

As described above, according to the MPEG transport stream recording / reproducing apparatus of the fifth embodiment, the MPE
When playing back a G-TS, the PSI included in the MPEG-TS
Is detected as PSI data and added to the beginning of the MPEG-TS, so that it is not necessary to record the PSI data from the PSI detecting means, and the MPEG-T
The preparation time required for reproducing S can be shortened as a whole, and the operation of PSI detection can be performed separately from recording and reproduction, that is, independently of the operation of the recording control means 2 and the reproduction control means 4. it can.

As in the fourth embodiment, in the above description, PAT, PMT and C
Although the description has been made assuming that each packet of the AT is a single packet, PAT, PMT and CAT
May be composed of a plurality of packets. In this case, when detecting the PSI, the PSI detecting means 1 simultaneously detects the arrangement order of the plurality of packets together with the cyclic counter values of PAT, PMT and CAT. Similarly to the above, MP
Addition to EG-TS.

As a method of maintaining the continuity of the cyclic counter value, the cyclic counter value of the PSI data to be added is rewritten according to the cyclic counter value of each PSI originally included in the MPEG-TS. Alternatively, each PSI originally included in the MPEG-TS may be replaced according to the cyclic counter value of the PSI data to be added.

In the first to fifth embodiments, an MPEG transport stream is selected as a recording / playback target signal. However, the present invention is not limited to this.
In short, the signal to be recorded / reproduced according to the present invention, such as SS (a format broadcast on a digital TV in the United States), may be a predetermined signal that discretely includes additional information of a program.

In the first to fifth embodiments, the MPEG transport stream including PSI has been described as an example. However, instead of PSI, PCR (Prog
Embodiments 1 to 5 can also be applied to the case of handling ram clock reference (see FIG. 12). The drawings and the description of the embodiment using the PCR can be easily understood by replacing the PSI in each drawing and the corresponding description in the first to fifth embodiments with the PCR, so that the drawing and the description are omitted.

In the first to fifth embodiments, an MPEG transport stream including PSI has been described as an example. However, instead of PSI, SI (Servic
e Information) (see FIG. 13), the first to fifth embodiments can be applied. The drawings and description of the embodiment using the SI can be easily understood by replacing the PSI in each of the drawings in the first to fifth embodiments with the corresponding description with SI, and the drawings and description thereof will be omitted. (Embodiment 6) FIG. 6 is a diagram showing a configuration of a video stream recording / reproducing apparatus according to Embodiment 6 of the present invention. As shown in FIG.
In I, the I-frame position information detecting means 11 and the recording control means 2 are means for directly receiving an input of a video stream. The recording means 3 includes a means for recording a video stream under the control of the recording control means 2, a reproduction control means 4
Means for reproducing the video stream recorded in the recording means 3, and the I-frame position information management means 12 receives the input from the I-frame position information detection means 11 and the recording control means 2 and records the video stream into the video stream. This is a means for outputting to the outside of the playback device 60.

The sixth embodiment having the above configuration will be described below.

First, the recording operation will be described. When the recording control unit 2 starts an operation to record a video stream, an external input of the video stream is performed,
The video stream is transmitted to the I-frame position information detecting means 11.
And recording control means 2. Upon receiving the input of the video stream, the recording control unit 2 records this in the recording unit 3. In the recording means 3, the video stream is stored as stored data.

On the other hand, the I frame position information detecting means 11
Receives the input of the video stream, detects the position of the I-frame in the video stream, and inputs it to the I-frame position information management means 12 as the I-frame position information.

Upon receiving the I-frame position information from the I-frame position information detecting means 11, the I-frame position information managing means obtains the information and the information from the recording control means 2, and the I-frame position information is While detecting the position of the video data stored in the recording means 3,
The storage position of the I frame position information on the recording means 3 is managed.

As described above, in the recording operation, the recording means 3 stores the video stream, and the I-frame position information managing means 12 stores the storage position of the I-frame position information on the recording means 3.

Next, the reproducing operation will be described. The reproduction control means 4 reads the video stream recorded in the recording means 3. Further, the reproduction control means 4 acquires the storage position of the I frame position information managed by the I frame position information detection means 11, detects the position of the I frame from the video stream input from the recording means 3, The video stream starting with the I frame is output to the outside of the video stream recording / reproducing device 60.

The reproduced video stream is decoded by a conventional video stream decoder. At this time, as shown in FIG. 2B, the video stream processed by the video Since the frame is input to the decoder first, the operation of detecting the I frame by the decoder is omitted.

As described above, according to the MPEG transport stream recording / reproducing apparatus of the sixth embodiment, at the time of recording a video stream, an I-frame included in a video stream to be recorded in advance is detected as I-frame position information. At the time of reproduction, by outputting the video stream with this I frame at the head, the operation of detecting the I frame by the decoder at the time of decoding can be omitted, and the preparation time required for reproduction can be shortened as a whole. (Embodiment 7) FIG. 7 is a diagram showing a configuration of a video stream recording / reproducing apparatus according to Embodiment 7 of the present invention. As shown in the figure, in the video stream recording / reproducing device 70,
6 denote the same parts or the same means. The I-frame position information detecting means 11 and the recording control means 2 are means for directly receiving an input of a video stream, and the I-frame position information detecting means 11 is a means for inputting to the recording control means 2, an I-frame position information reading means. Reference numeral 13 denotes a unit that accesses the recording unit 3 and inputs data to the reproduction control unit 4.

The sixth embodiment having the above configuration will be described below.

First, the recording operation will be described. When the recording control unit 2 starts an operation to record a video stream, an external input of the video stream is performed,
The video stream is transmitted to the I-frame position information detecting means 11.
And recording control means 2.

Next, the I frame position information detecting means 11
Receives the input of the video stream, detects the position of the I frame in the video data, and inputs it to the recording control means 2 as I frame position information.

Upon receiving the input of the video stream and the I-frame position information, the recording control unit 2 records both of them in the recording unit 3. In the recording means 3, the video stream and the I-frame position information are stored as accumulated data.

Next, the reproducing operation will be described. Reproduction control means 4
Reads the video stream recorded in the recording means 3.

On the other hand, I frame position information reading means 1
3 also accesses the recording means 3 to obtain I frame position information and inputs it to the reproduction control means 4.

Upon receiving the input of the above-mentioned I-frame position information, the reproduction control means 4 detects the position of the I-frame from the video stream read from the recording means 3 based on the input, and places the I-frame at the beginning. So that the video stream is output to the outside of the video stream recording / reproducing device 70.

The reproduced video stream is decoded by a conventional video stream decoder. However, as in the sixth embodiment, since the video stream is input to the decoder with the I frame at the head, The detection operation is omitted.

As described above, according to the video stream recording / reproducing apparatus of the seventh embodiment, when recording the video stream, the I stream included in the video stream to be recorded in advance is used.
The frame is detected as I-frame position information, recorded in the recording means, the I-frame position information and the video stream are reproduced, and the video stream is output with the I-frame at the head. By omitting the operation of I-frame detection, the preparation time required for reproduction can be shortened as a whole. (Eighth Embodiment) FIG. 8 is a diagram showing a configuration of a video stream recording / reproducing apparatus according to an eighth embodiment of the present invention. As shown in the figure, the same reference numerals as those in FIG. 6 denote the same parts or the same means. The sixth embodiment having such a configuration will be described below.

First, the recording operation will be described. When the recording control unit 2 starts an operation to record a video stream, an external input of the video stream is performed,
The video stream is transmitted to the I-frame position information detecting means 11.
And recording control means 2.

Upon receiving the input of the video stream, the I-frame position information detecting means 11 detects the position of the I-frame from this video stream as I-frame position information.
Generating a recording start signal including the I frame position information;
This is input to the recording control means 2.

On the other hand, when receiving the input of the video stream and the recording start signal, the recording control means 2 detects an I frame from the input video stream based on the I frame position information included in the recording start signal, and The video stream after the I frame is recorded in the recording means 3. The recording control unit 2 discards the video stream before the I frame and does not record the video stream on the recording unit 3.

As described above, in the recording operation, the recording means 3 stores the video stream after the I frame detected by the I frame position information detecting means.

Next, the reproducing operation and decoding are performed in the same manner as in the conventional video stream recording / reproducing apparatus. However, as in the sixth and seventh embodiments, the video stream has a structure in which the I frame is at the head. Therefore, the operation of detecting the I frame by the decoder is omitted.

As described above, according to the video stream recording / reproducing apparatus of the eighth embodiment, when recording a video stream, an I-frame included in the video stream to be recorded is detected in advance as I-frame position information. At the time of recording, by recording the video stream with this I frame at the head, the operation of detecting the I frame by the decoder at the time of decoding can be omitted, and the preparation time required for reproduction can be shortened as a whole.

In each of the embodiments of the present invention,
The MPEG transport stream recording / reproducing apparatus for detecting the PSI and the MPEG video stream recording / reproducing apparatus for detecting the I frame have been described as separate apparatuses. 3 may be used in common and each part and each means may be arbitrarily combined. In this case, the MPEG-TS
Can be further reduced.

In each embodiment of the present invention,
PSI detection means 1, recording control means 2, reproduction control means 4,
PSI adding means 5, I frame position information detecting means 11,
The operation of the I-frame position information management means 12 and the I-frame position information reading means 13 has been described as being realized by hardware, but this is realized by software by a program using a computer. Is also good.

In each embodiment of the present invention,
Although the MPEG transport stream recording / reproducing apparatus or the MPEG video stream recording / reproducing apparatus of the present invention has been mainly described, the present invention provides all or a part of the functions of the above-mentioned present invention by a computer. A medium that carries a program and / or data to be executed, and is a medium that is readable by a computer and that executes the function in cooperation with the computer.

Here, the data includes a data structure, a data format, a type of data, and the like.

The medium includes a recording medium such as a ROM, a transmission medium such as the Internet, and a transmission medium such as light, radio waves, and sound waves.

[0097] The carried medium includes, for example, a recording medium on which a program and / or data is recorded, a transmission medium for transmitting the program and / or data, and the like.

[0098] The term "processable by a computer" means that the program can be read by a computer in the case of a recording medium such as a ROM, and the program and / or data to be transmitted in the case of a transmission medium. Is to be handled by a computer as a result of the transmission.

The information aggregate includes, for example, software such as programs and / or data.

[0100]

As is apparent from the above description, according to the present invention, high-speed data reproduction can be realized while saving the time of PSI or PCR detection at the time of decoding.

Further, according to the present invention, I
High-speed data reproduction without frame detection time can be realized.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of an MPEG transport stream recording / playback apparatus according to a first embodiment of the present invention.

FIG. 2A is a diagram showing a configuration of an MPEG-TS processed by the MPEG transport stream recording / playback apparatus of the present invention. FIG. 2B is a diagram illustrating a configuration of a video stream processed by the MPEG video stream recording / playback apparatus of the present invention.

FIG. 3 is a diagram showing a configuration of an MPEG transport stream recording / playback apparatus according to a second embodiment of the present invention.

FIG. 4 is a diagram showing a configuration of an MPEG transport stream recording / reproducing device according to a third embodiment of the present invention.

FIG. 5 is a diagram showing a configuration of an MPEG transport stream recording / playback apparatus according to a fourth embodiment of the present invention.

FIG. 6 is a diagram showing a configuration of an MPEG transport stream recording / reproducing device according to a fifth embodiment of the present invention.

FIG. 7 is a diagram showing a configuration of an MPEG video stream recording / playback apparatus according to a sixth embodiment of the present invention.

FIG. 8 is a diagram showing a configuration of an MPEG video stream recording / playback apparatus according to a seventh embodiment of the present invention.

FIG. 9 is a diagram showing a configuration of an MPEG video stream recording / playback apparatus according to an eighth embodiment of the present invention.

FIG. 10A is a diagram showing a configuration of a stream decoder according to a conventional technique. (B) is a flowchart showing how the AV data decoder decodes the MPEG-TS.

FIG. 11 (a) M processed on a stream decoder
FIG. 3 is a diagram illustrating a configuration of a PEG-TS. (B) is a diagram illustrating a configuration of a video stream processed on a stream decoder.

FIG. 12 is a diagram showing the presence of a PCR in an MPEG transport stream.

FIG. 13 is a diagram illustrating the presence of SI in an MPEG transport stream.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 PSI or SI detection means 2 Recording control means 3 Recording means 4 Reproduction control means 5 PSI or SI addition means 6 PSI or SI position information management means 10, 20, 30, 40, 50 MPEG transport stream recording / reproduction device 11 I frame Position information detecting means 12 I frame position information managing means 13 I frame position information reading means 60, 70, 80 Video stream recording / reproducing apparatus 100 Stream decoder 110 Transport decoder 120 AV data decoder 130 Frame buffer

Claims (31)

[Claims] A first recording unit for recording a predetermined signal that discretely includes additional information of a program; a recording control unit for causing the first recording unit to record the predetermined signal; Playback control means for playing back the predetermined signal from the first recording means; additional information I detection means for detecting additional information of the program from the predetermined signal; and addition of adding the additional information to the predetermined signal. A recording / reproducing apparatus comprising information adding means. 2. A first recording unit for recording a predetermined signal discretely including additional information of a program, a recording control unit for causing the first recording unit to record the predetermined signal, Reproduction control means for reproducing the predetermined signal from the first recording means; and program specification information (Program Specific Information) from the predetermined signal.
formation (hereinafter PSI) or SI (Service Informati)
on, hereinafter referred to as SI), a PSI or SI detecting means, and a PSI for adding the PSI or SI to the predetermined signal.
Alternatively, a recording / reproducing apparatus provided with SI adding means. 3. The recording / reproducing apparatus according to claim 2, wherein the predetermined signal is an MPEG transport stream. 4. The PSI or SI detecting means detects PSI or SI when recording an MPEG transport stream, and the PSI or SI adding means detects the PSI or SI when reproducing the MPEG transport stream.
4. The recording / reproducing apparatus according to claim 3, wherein the PSI or SI is obtained from the I or SI detecting means, and the PSI or SI is added to the head of the MPEG transport stream reproduced from the first recording means. 5. The PSI or SI detection means comprises an MPE
The PSI or SI is detected at the time of reproducing the G transport stream, and the PSI or SI adding means detects the PSI or the SI at the time of reproducing the MPEG transport stream.
4. The recording / reproducing apparatus according to claim 3, wherein the PSI or SI is obtained from the I or SI detecting means, and the PSI or SI is added to the head of the MPEG transport stream output by the reproducing control means. 6. A second recording unit for recording a predetermined signal discretely including additional information of a program, a recording control unit for recording the predetermined signal on the second recording unit, Reproduction control means for reproducing the predetermined signal from the second recording means; and PSI or SI detection means for detecting PSI or SI from the predetermined signal, wherein the PSI or SI detection means comprises: At the time of recording, PSI or SI is detected from a predetermined signal and added to the head of the predetermined signal, and the second recording means records the predetermined signal with PSI or SI added to the head. Recording / reproducing apparatus characterized by the above-mentioned. 7. The recording / reproducing apparatus according to claim 6, wherein the predetermined signal is an MPEG transport stream. 8. PSI or SI detection means for detecting PSI or SI from a predetermined signal discretely containing additional information of a program, and third recording means for recording the predetermined signal and the PSI or SI. The predetermined signal and the PSI are transmitted to the third recording means.
Or a recording control unit for recording the SI, and the predetermined signal and the PS from the third recording unit.
Reproduction control means for reproducing I or SI; and PS for managing the location of the PSI or SI recorded on the third recording means as PSI or SI position information.
I or SI position information management means, wherein the PSI or SI detection means detects PSI or SI at the time of recording the predetermined signal, The PSI or SI position information management means, at the time of recording the predetermined signal, From the recording control means,
Acquiring the PSI or SI position information, and, at the time of reproducing the predetermined signal, adding the PSI or SI to the beginning of the predetermined signal reproduced by the reproduction control means based on the PSI or SI position information. Recording and reproducing device. 9. The recording / reproducing apparatus according to claim 8, wherein the predetermined signal is an MPEG transport stream. 10. PSI or SI for detecting PSI or SI from a predetermined signal discretely containing additional information of a program
Detecting means; fifth recording means for recording the predetermined signal and the PSI or SI; recording control means for causing the fifth recording means to record the predetermined signal; and fifth recording means. A reproduction control means for reproducing the predetermined signal from the PSI or SI;
PSI or SI position information management means for managing as position information, wherein the PSI or SI detection means detects PSI or SI from the predetermined signal recorded in the fifth recording means, and 5, the PSI or SI position information management means, when reproducing the predetermined signal, based on the PSI or SI position information, sets a PSI or SI position information at the beginning of the predetermined signal reproduced by the reproduction control means. Alternatively, a recording / reproducing apparatus to which SI is added. 11. The recording / reproducing apparatus according to claim 10, wherein said predetermined signal is an MPEG transport stream. 12. The PSI or SI has a cyclic counter value, and PSI added to the MPEG transport stream.
12. The SI or SI cyclic counter value has continuity with the PSI or SI cyclic counter value included in the MPEG transport stream. The recording / reproducing apparatus as described in the above. 13. The MP to which the PSI or SI is added.
10. The EG transport stream, the contents of which have been rewritten, wherein:
2. The recording / reproducing device according to 1. 14. A cyclic counter value of PSI or SI added to said PSI or SI adding means is a value of the MPEG.
PSI originally included in the transport stream
The continuity is maintained by being rewritten according to a cyclic counter value of SI.
2. The recording / reproducing device according to 1. 15. The PSI or SI cyclic two-counter value originally included in the MPEG transport stream is a PSI or SI added to the PSI or SI adding means.
2. The continuity is maintained by replacing the continuity according to a cyclic counter value of SI.
3. The recording / reproducing apparatus according to 3. 16. A sixth recording unit for recording an MPEG video stream, a recording control unit for recording the MPEG video stream on the sixth recording unit, and a video signal of the MPEG from the sixth recording unit. Reproduction control means for reproducing a stream; I-frame position information detection means for detecting the position of an I-frame in the MPEG video stream as I-frame position information; and I-frame position information management means for managing the I-frame position information. The reproduction control means obtains I-frame position information from the I-frame position information management means, and based on the I-frame position information,
M for reproducing a PEG video stream
PEG video stream recording and playback device. 17. An I-frame position information detecting means for detecting a position of an I-frame in an MPEG video stream as I-frame position information; and a seventh recording means for recording the MPEG video stream and the I-frame position information. Recording control means for causing the seventh recording means to record the MPEG video stream and the I-frame position information; reproduction control means for reproducing the MPEG video stream from the seventh recording means; 7, an I-frame position information management unit that manages the location where the I-frame position information is recorded as management information, and an I-frame position information reading unit that reads the I-frame position information based on the management information. Wherein the I-frame position information reading means comprises: Sometimes, the I-frame position information is read from the seventh recording means and output to the reproduction control means. The reproduction control means sets the I-frame based on the I-frame position information, An MPEG video stream recording / playback apparatus for playing back video data in the MPEG video stream. 18. Eighth recording means for recording an MPEG video stream; recording control means for recording said MPEG video stream in said eighth recording means; and said MPEG video data from said eighth recording means. Playback control means for playing back the stream; and I-frame position information detecting means for detecting the position of an I-frame in the MPEG video stream as I-frame position information. Means for obtaining I-frame position information from the
Discards the video stream before the frame and creates an MPEG
An MPEG video stream recording / reproducing apparatus, characterized in that said video stream is recorded in said eighth recording means. 19. A first recording unit for recording an MPEG transport stream; a recording control unit for recording the MPEG transport stream on the first recording unit; Playback control means for playing back the transport stream; and PCR (Pr
PC that detects gram Clock Reference (hereinafter PCR)
A recording / reproducing apparatus comprising: an R detection unit; and a PCR adding unit that adds the PCR to the MPEG transport stream. 20. The PCR detecting means detects a PCR at the time of recording the MPEG transport stream, and the PCR adding means acquires the PCR from the PCR recording means at the time of reproducing the MPEG transport stream, and 20. The recording / reproducing apparatus according to claim 19, wherein the PCR is added to a head of the MPEG transport stream reproduced from the recording means. 21. The PCR detecting means detects a PCR at the time of reproducing an MPEG transport stream, and the PCR adding means at a time of reproducing the MPEG transport stream.
20. The recording / reproducing apparatus according to claim 19, wherein the PCR is acquired from the R detection means, and the PCR is added to the head of the MPEG transport stream output by the reproduction control means. 22. A second recording unit for recording an MPEG transport stream, a recording control unit for recording the MPEG transport stream on the second recording unit, and a second recording unit for recording the MPEG transport stream from the second recording unit. Playback control means for playing back the transport stream; and PCR detection means for detecting PCR from the MPEG transport stream. The PCR detection means, when recording the MPEG transport stream,
The PCR is detected from the PEG transport stream and added to the head of the MPEG transport stream, and the second recording unit outputs the M with the PCR added to the head.
A recording and reproducing apparatus for recording a PEG transport stream. 23. A PCR detecting means for detecting a PCR from an MPEG transport stream, the MPEG transport stream and the PC
A third recording unit that records R; a recording control unit that causes the third recording unit to record the MPEG transport stream and the PCR; and a third recording unit that stores the MPEG transport stream and the PCR from the third recording unit. Playback control means for playing back, and PCR position information management means for managing a place where the PCR is recorded on the third recording means as PCR position information, wherein the PCR detection means comprises the MPEG transport stream. When the MPEG transport stream is recorded, a PCR is detected when the MPEG transport stream is recorded.
Acquiring the PCR position information from the recording control means, and reproducing the MPEG transport stream,
Based on the PCR position information, the PC is added to the head of the MPEG transport stream reproduced by the reproduction control means.
A recording / reproducing apparatus characterized by adding R. 24. PCR detecting means for detecting a PCR from an MPEG transport stream, the MPEG transport stream and the PC
Fifth recording means for recording R, recording control means for recording the MPEG transport stream on the fifth recording means, and reproduction control for reproducing the MPEG transport stream from the fifth recording means Means; and PCR position information management means for managing the location where the PCR is recorded as PCR position information, wherein the PCR detection means converts the MPEG transport stream recorded in the fifth recording means into a PC.
R is detected and recorded in the fifth recording means. The PCR position information management means, when reproducing the MPEG transport stream,
Based on the PCR position information, a P is added to the beginning of the MPEG transport stream reproduced by the reproduction control means.
A recording / reproducing apparatus characterized by adding a CR. 25. The PCR having a cyclic counter value, and a P added to the MPEG transport stream.
25. The cyclic counter value of CR holds continuity with the cyclic counter value of PCR included in the MPEG transport stream.
The recording / reproducing apparatus according to any one of the above. 26. The recording / reproducing apparatus according to claim 19, wherein the content of the MPEG transport stream to which the PCR has been added has been rewritten. 27. A PC added to the PCR adding means
26. The recording / reproducing apparatus according to claim 25, wherein the continuity is maintained by rewriting a cyclic counter value of R according to a cyclic counter value of PCR originally included in the MPEG transport stream. apparatus. 28. The continuity is maintained by replacing a cyclic counter value of a PCR originally included in the MPEG transport stream in accordance with a cyclic counter value of a PCR added to the PCR adding means. The recording / reproducing apparatus according to claim 26, wherein: 29. The recording / reproducing apparatus according to claim 1, which has a random access function. 30. A medium carrying a program and / or data for causing a computer to execute all or a part of the functions of all or part of the present invention according to any one of claims 1 to 28. A medium which can be processed by a computer. 31. A program and / or data for causing a computer to execute all or a part of functions of all or a part of the present invention according to any one of claims 1 to 28. Information aggregate to do.