JP2006050142A - Broadcast signal distribution storage device and broadcast signal transmitter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a broadcast signal distribution storage device and a broadcast signal transmitter capable of continuing distribution of contents such as program information even in a failure of a plurality of storage devices (HDDs). <P>SOLUTION: The broadcast signal distribution storage device includes: a TS distribution section 1100 that separates regular content information into a compressed base data (B) and extension information for extending the base data (B), separates furthermore the extension information into a plurality of enhance data (E), arbitrarily combines the base data (B) and a plurality of the enhance data (E), and multiplexes them to produce a plurality of storage bit streams; and a plurality of data storage devices 1210, 1220, 1230, 1240 for respectively storing a plurality of the storage bit streams, and the broadcast signal distribution storage device reduces the storage information amount of the respective data storage devices and can continue distribution of streams (contents) of the program information or the like even in a failure of a plurality of the storage devices. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a broadcast signal storage device and transmission device for storing a broadcast-use program and the like, and in particular, even if a plurality of storage devices (HDDs) fail, the stored contents are not lost and the provision of the program continues. The present invention relates to a broadcast signal distributed storage device and a broadcast signal transmission device that can be performed in this manner.

  Conventionally, when important information is stored in a hard disk device or the like, in preparation for a disk failure, information equivalent to the stored information is used as backup data for other storage devices such as magnetic tape or other It is stored on a hard disk.

  Furthermore, in order to use exactly the same information as backup data, the problem of having to temporarily stop normal processing operations is resolved, and access is distributed using multiple storage devices such as hard disk devices. Thus, a technique called RAID (Redundant Arrays of Independent (Inexpensive) Disks) has been proposed as a technique for realizing a high-speed, large-capacity and highly reliable disk device.

  RAID can be divided into several stages according to its function. In the simplest case, data is distributed to multiple disks, but in advanced cases, parity and error correction are added to the data to be written, and then they are distributed to multiple disks. Is to prevent data loss.

  For RAID, five levels of RAID, RAID 1 to RAID 5, are defined, and RAID 0 and RAID 6 are added. Note that a large RAID level number does not mean that it is multifunctional or high performance. In addition, the RAID level incorporated in the actual product is selected from the above seven levels, and a unique RAID level that is not shared, such as RAID 0 + 1 or RAID 10/30/50 combining a plurality of RAID levels. May be implemented.

  Hereinafter, main RAID levels will be described.

  First, a system configuration diagram of RAID 0 will be described with reference to FIG.

  RAID0 is called disk striping and is a method of storing data in a divided manner. This method does not have a fault tolerance function because the storage device has no redundancy, but is used as a method for increasing the read / write processing speed for the storage device.

  As shown in FIG. 9, when there are four storage devices in RAID 0, when handling data [A], [B], [C], [D], [A] to HDD 20 and [B] to HDD 21 ], [C] to the HDD 22, and [D] to the HDD 23, and can be distributed and processed simultaneously. Another feature is that a plurality of storage devices are handled as one logical storage device. However, it may be said that the storage device is not RAID because it does not have redundancy.

  Next, a system configuration diagram of RAID 1 will be described with reference to FIG.

  RAID1 is a method called mirroring. In this method, two storage devices HDD30 and HDD31 are provided, and the same data is written simultaneously at the time of writing. Thus, since one storage device is redundant, data maintenance is realized in the other storage device even when a failure occurs. For example, when data [A] and [B] are handled, the HDD 30 and the HDD 31 record the same data [A] and [B]. Therefore, even if a failure occurs in one of the recording devices, the data can be maintained by the other recording device. However, data cannot be maintained if the two recording devices simultaneously fail. Moreover, although it has two storage devices, since the contents are the same, the total capacity of the disk array remains the capacity of one storage device.

  Further, at the time of reading, the performance is improved by devising the reading algorithm, but the performance improvement rate is not so large compared to a normal storage device that is not RAID.

  Next, a system configuration diagram of RAID 5 will be described with reference to FIG.

  RAID5 is called distributed parity, and is a system that divides data, further creates parity data of the divided data, and distributes and stores them on each disk (striping (block) and parity drive (distributed)). In this method, it is composed of three or more storage devices, and the parity of read / write data is distributed to the storage devices. In this case, the speed of the disk is increased, but the reliability is improved by creating parity data.

  As shown in FIG. 11, in RAID5, when four storage devices are configured, even if a failure occurs in one storage device due to parity, the data in the failure storage device is replaced by the data in the remaining storage devices. Generate and continue processing.

  In FIG. 11, when data [A], [B], and [C] are handled, the storage devices such as [A] to the HDD 40, [B] to the HDD 41, [C] to the HDD 42, and parity data to the HDD 43 are shown. Is accessed. Storage devices that read and write parity data are controlled to be distributed, and in this example, parity data is recorded in the HDD 40 at the next access. It is the disk array control device 6 that generates parity data and inspects for data anomalies using the parity data.

  In addition, although a method of replacing the generation and checking of the parity data with system software has been devised, it is not used so much because the load on the CPU of the system is large. Note that parity data is dedicated to a specific storage device and is read and written in RAID 4, but reading for parity data generation and checking is concentrated on a specific recording device, which places a burden on the processing. Become the bottleneck of speed. In RAID5, parity data is also distributed to storage devices, so that the load for generating and checking parity data is also distributed to improve the processing speed.

  In addition, unlike RAID 1, three or more storage devices can be handled, and the capacity of storage devices other than the amount of parity data can be handled for data processing. Therefore, by adding a storage device, the total capacity of the entire RAID 5 storage device can be increased. Can do.

  Furthermore, even if a failure occurs in one recording device, the fault tolerance of holding data in the other recording device, and the order of reading from the two recording devices during reading is analyzed to be the shortest Then, taking advantage of realizing high-speed reading by executing reading, a disk array control device has been proposed in which one additional recording device such as a hard disk is added and three recording devices are used ( For example, see Patent Document 1).

  A system configuration diagram of this disk array control apparatus will be described with reference to FIG.

  As shown in FIG. 12, the disk array control device 50 writes the same data simultaneously into the three recording devices HDD 53, HDD 54, and HDD 55 at the time of writing. It has a disk array control circuit 51 having an algorithm capable of analyzing read data in advance at the time of reading and selecting a read target storage device or giving a read command so that it can be read in the shortest time.

  Thus, with respect to RAID1, the number of recording devices is changed from two to three, thereby improving the fault tolerance of the recording device. That is, even if there is a failure in one recording device, it is still possible to operate with the configuration of RAID 1 with two recording devices, and even if there is a failure in one recording device, the data recorded in the recording device Is stored by the last one recording device. Even if up to two of the three recording devices become faults, the recorded data can be guaranteed, so that fault tolerance can be improved compared to normal RAID1.

According to such a conventional technique, a broadcasting storage device (HDD recorder) is generally configured to use a RAID configuration assuming that the storage device (HDD) fails. For example, RAID 5 is used as a broadcasting storage device so that even if one HDD fails, the operation is not hindered.
JP 2003-316525 A

  However, in such a conventional storage device for broadcasting (HDD recorder), when one storage device (HDD) fails, there is no problem in operation, but for the failure of two or more HDDs. As a result, there is a problem that the operation cannot be performed and the recorded contents of the program and the like are completely lost. Thus, the problem that the reproduction cannot be continued or the recorded content is lost becomes a fatal problem in the case of broadcasting.

  Also, in order to cope with the failure of two storage devices (HDD), when using a conventional disk array control device, the same data is written to all three storage devices, so the amount of information that can be stored is There is only one storage capacity. For this reason, in order to store a large amount of information, there is a problem that three storage devices waiting for a large storage capacity must be prepared.

  Also, since there are three storage devices, it can withstand failures up to two, but there is a problem that all data will be lost if a failure occurs in three. In order to avoid this problem, it is conceivable to increase the number of storage devices. However, if the number of storage devices is increased, there is a problem that a large number of storage devices having a large storage capacity must be prepared as described above. As the number of storage devices increases, this becomes a serious problem. In this case, even if the number of large-capacity storage devices is increased, there is a problem that the amount of information that can be stored is only one storage capacity.

  The present invention has been made in order to solve such a conventional problem, and includes basic information obtained by compressing regular content information and extended information that is added to the basic information and approximates the regular content. Further, by separating the extended information into a plurality of pieces and distributing and storing the basic information and the plurality of extended information in a plurality of storage devices, the storage information of each storage device is reduced. The present invention provides a broadcast signal distributed storage device and a broadcast signal transmission device capable of continuing the distribution of a stream (content) such as program information even when a plurality of storage devices (HDDs) fail.

  The broadcast signal distributed storage device according to the present invention is a broadcast signal distributed storage device that stores an original encoded signal in which one content is stored in a plurality of encoded signal storage devices, and transmits the broadcast signal. A basic encoding signal for reducing a code amount of the original encoded signal and generating a basic encoded signal for recovering a secondary moving image that is a pseudo moving image of the primary moving image recovered from the original encoded signal Signal generating means, extended encoded signal generating means for generating a plurality of extended encoded signals from information lost when converting the original encoded signal into the basic encoded signal, and the basic encoded signal; A plurality of the extension coded signals are arbitrarily combined and multiplexed to generate a plurality of storage coded signals, and a plurality of previous coded signals including the basic coded signal are included. A coded signal storage unit for storing the coded signal for storage in the plurality of coded signal storage devices, and the coded signal for storage is read from the plurality of coded signal storage devices, and the basic coding is performed. A basic extended encoded signal separating means for separating a signal and the extended encoded signal, and extracting one basic encoded signal and a plurality of different extended encoded signals, and the basic extended encoded signal A synthesized coded signal generating means for synthesizing the one basic coded signal extracted by the separating means and the plurality of different extended coded signals to generate a synthesized coded signal; and the synthesized coding Broadcast signal transmission means for converting the composite encoded signal generated by the signal generation means into the broadcast signal and transmitting it.

  With this configuration, a plurality of encoded signal storage devices store a basic encoded signal and an extended encoded signal that have a smaller code amount than the original encoded signal, and other basic codes can be used even if a plurality of encoded signal storage devices fail. Broadcasting can be continued by extracting data from the encoded signal storage device in which the encoded signal is stored, and the storage capacity for storing broadcast data can be reduced.

  Also, the broadcast signal distributed storage device according to the present invention is the broadcast signal distributed storage device according to claim 1, wherein the encoded signal multiplexing means applies the basic encoding to all the stored encoded signals. It has a configuration characterized in that signals are multiplexed and generated.

  With this configuration, broadcasting can be continued if data can be read out even with one of the encoded signal storage devices storing the encoded signal for storage.

  Furthermore, the broadcast signal distributed storage device according to the present invention is the broadcast signal distributed storage device according to claim 2, wherein the encoded signal multiplexing means includes the basic encoded signal and any one or more of the one or more. It has a configuration characterized in that the extended encoded signal is multiplexed and each of the stored encoded signals is generated.

  With this configuration, an extended encoded signal is stored in each encoded signal storage device, and as many high-quality images as the number of encoded signal storage devices capable of reading data can be provided.

  Furthermore, the broadcast signal distributed storage device according to the present invention is the broadcast signal distributed storage device according to any one of claims 1 to 3, wherein the basic extended encoded signal separation means includes a plurality of the codes. A basic encoded signal with few signal errors is selected and extracted from basic encoded signals extracted from the encoded signal for storage read from the encoded signal storage device.

  With this configuration, it is possible to select the highest quality encoded signal that does not cause any trouble in reading / writing or saving, and it is possible to reproduce the image without reducing the video quality at the time of restoration.

  Further, the broadcast signal distributed storage device according to the present invention is the broadcast signal distributed storage device according to any one of claims 1 to 4, wherein the audio code is a signal of audio information from the original encoded signal. Speech encoded signal separating means for separating encoded signals, speech encoded signal storage means for storing the separated speech encoded signals in any of the plurality of encoded signal storage devices, and the plurality of encodings Speech encoded signal extraction means for extracting the speech encoded signal from a signal storage device, and the synthesized encoded signal generating means outputs the speech encoded signal extracted by the speech encoded signal extracting means, It has a configuration characterized in that it is synthesized with the synthesized encoded signal.

  With this configuration, audio information and video information having different properties can be handled completely separately, which facilitates handling and improves the compression rate of the code amount, particularly efficiently compressing video information. .

  Furthermore, the broadcast signal distributed storage device according to the present invention is the broadcast signal distributed storage device according to claim 5, wherein the audio encoded signal storage means stores all the codes in which the storage encoded signals are stored. The encoded signal storage device stores the speech encoded signal.

  With this configuration, if one of the encoded signal storage devices can read data, broadcasting can be continued.

  Furthermore, the broadcast signal distributed storage device according to the present invention is the broadcast signal distributed storage device according to claim 5 or 6, wherein the audio encoded signal separating means converts the audio information from the original encoded signal. A configuration in which all are separated as one speech encoded signal, and the speech encoded signal storage means stores the one speech encoded signal in any of the plurality of encoded signal storage devices. Have.

  With this configuration, the generation of noise due to the dispersion of speech encoded signals does not occur, and the restored speech can be made clear.

  Furthermore, the broadcast signal distributed storage device according to the present invention is the broadcast signal distributed storage device according to any one of claims 1 to 4, wherein the basic encoded signal generating means generates a sound from the original encoded signal. Separating a speech encoded signal that is an information signal, generating the basic encoded signal from an encoded signal obtained by removing the speech encoded signal from the original encoded signal, and the encoded signal multiplexing means, Along with the basic encoded signal and the plurality of extended encoded signals, the speech encoded signals are arbitrarily combined and multiplexed to generate the plurality of storage encoded signals, and the basic extended encoded signal separating means includes: Read the encoded signal for storage from the plurality of encoded signal storage devices, separate the speech encoded signal together with the basic encoded signal and the extended encoded signal, and The encoded signal, a plurality of different extension encoded signals different from each other, and the speech encoded signal are extracted, and the synthesized encoded signal generating means is extracted by the basic extended encoded signal separating means A speech encoded signal is synthesized with the synthesized encoded signal.

  With this configuration, audio information and video information having different properties can be handled separately without providing an audio data separation unit or audio data extraction unit, and handling can be facilitated.

  Furthermore, in the broadcast signal transmitting apparatus of the present invention, an original encoded signal in which one content is stored is distributed and stored in a plurality of encoded signal storage devices, and the storage signal is stored. In a broadcast signal transmitting apparatus that reads an encoded signal and transmits a broadcast signal, the image is a pseudo moving image of a primary moving image that is reduced from the original encoded signal and restored from the original encoded signal. A basic encoded signal for restoring a secondary moving image and a plurality of extended encoded signals generated from information lost when converting the original encoded signal into the basic encoded signal are multiplexed in any combination. The encoded signal for storage is read from the encoded signal storage device that stores the plurality of encoded encoded signals for storage, and the basic encoded signal and the extended encoded signal are separated. And a basic extended encoded signal separating means for extracting one basic encoded signal and a plurality of different extended encoded signals, and the one basic extracted by the basic extended encoded signal separating means. A synthesized encoded signal generating unit that generates a synthesized encoded signal by synthesizing the encoded signal and the plurality of different extended encoded signals, and a synthesized code generated by the synthesized encoded signal generating unit And a broadcast signal transmitting means for converting the converted signal into a broadcast signal and transmitting it.

  With this configuration, even if a plurality of encoded signal storage devices fail, broadcasting can be continued by extracting data from the encoded signal storage device in which other basic encoded signals are stored.

  Furthermore, the broadcast signal transmitting apparatus according to the present invention is the broadcast signal transmitting apparatus according to claim 9, wherein the basic extended encoded signal separating means reads the plurality of encoded codes from the encoded signal storage apparatus. The basic encoded signal extracted from the encoded signal is selected and extracted from the basic encoded signal with few signal errors.

  With this configuration, it is possible to select the highest quality encoded signal that does not cause any trouble in reading / writing or saving, and it is possible to reproduce the image without reducing the video quality at the time of restoration.

  Furthermore, the broadcast signal transmitting apparatus according to the present invention is the broadcast signal transmitting apparatus according to claim 9 or 10, wherein the basic extended encoded signal separating means stores the memory from the plurality of encoded signal storage apparatuses. A coded signal obtained by separating voice information from the original coded signal together with the basic coded signal and the extended coded signal, and a plurality of different basic coded signals. The extended encoded signal and the speech encoded signal, and the synthesized encoded signal generation means extracts the one basic encoded signal extracted by the basic extended encoded signal separation means, It has a configuration characterized in that the synthesized coded signal is generated by synthesizing the speech coded signal with a signal obtained by synthesizing a plurality of different extended coded signals.

  With this configuration, audio information and video information having different properties can be handled separately, which facilitates handling and improves the compression rate of the code amount, and in particular, efficiently compresses video information.

  Furthermore, the broadcast signal distribution storage method of the present invention distributes and stores an original encoded signal containing one content in a plurality of encoded signal storage devices, and transmits the broadcast signal. In the storage method, a basic encoding signal for reducing a code amount of the original encoded signal and generating a secondary encoded image that is a pseudo moving image of the primary moving image recovered from the original encoded signal is generated. An encoded signal generating step, an extended encoded signal generating step for generating a plurality of extended encoded signals from information lost when converting the original encoded signal into the basic encoded signal, and the basic encoded signal And a plurality of the extended coded signals are arbitrarily combined and multiplexed to generate a plurality of coded signals for storage, and the basic coded signal. A plurality of encoded signal for storage, each of which stores a plurality of encoded signals for storage in the plurality of encoded signal storage devices, and a plurality of encoded signal storages Read the storage encoded signal from the apparatus, separate the basic encoded signal and the extended encoded signal, and extract one basic encoded signal and a plurality of different extended encoded signals from each other A combined encoded signal obtained by combining the basic extended encoded signal separation step, the one basic encoded signal extracted in the basic extended encoded signal separation step, and the plurality of different extended encoded signals. And a broadcast signal transmission step for converting the composite encoded signal generated in the composite encoded signal generating step into the broadcast signal and transmitting the broadcast signal. It has a structure obtained by comprising the and.

  With this configuration, a plurality of encoded signal storage devices store a basic encoded signal and an extended encoded signal that have a smaller code amount than the original encoded signal, and other basic codes can be used even if a plurality of encoded signal storage devices fail. Broadcasting can be continued by extracting data from the encoded signal storage device in which the encoded signal is stored, and the storage capacity for storing broadcast data can be reduced.

  Furthermore, the broadcast signal distributed storage method of the present invention is the broadcast signal distributed storage method according to claim 12, wherein the encoded signal multiplexing step includes the basic encoding for all the stored encoded signals. It has a configuration characterized in that signals are multiplexed and generated.

  With this configuration, broadcasting can be continued if data can be read out even with one of the encoded signal storage devices storing the encoded signal for storage.

  Furthermore, the broadcast signal distributed storage method according to the present invention is the broadcast signal distributed storage method according to claim 13, wherein the encoded signal multiplexing step includes the basic encoded signal and any one or more of the one or more. It has a configuration characterized in that the extended encoded signal is multiplexed and each of the stored encoded signals is generated.

  With this configuration, an extended encoded signal is stored in each encoded signal storage device, and as many high-quality images as the number of encoded signal storage devices capable of reading data can be provided.

  Furthermore, the broadcast signal distributed storage method of the present invention is the broadcast signal distributed storage method according to any one of claims 12 to 14, wherein the basic extended coded signal separation step includes a plurality of the codes. A basic encoded signal with few signal errors is selected and extracted from basic encoded signals extracted from the encoded signal for storage read from the encoded signal storage device.

  With this configuration, it is possible to select the highest quality encoded signal that does not cause any trouble in reading / writing or saving, and it is possible to reproduce the image without reducing the video quality at the time of restoration.

  Furthermore, the broadcast signal distributed storage method of the present invention is the broadcast signal distributed storage method according to any one of claims 12 to 15, wherein the audio code is a signal of audio information from the original encoded signal. A speech encoded signal separating step for separating the encoded signal, a speech encoded signal storing step for storing the separated speech encoded signal in any of the plurality of encoded signal storage devices, and the plurality of encodings A speech encoded signal extracting step for extracting the speech encoded signal from a signal storage device, and the synthesized encoded signal generating step includes extracting the speech encoded signal extracted in the speech encoded signal extracting step, It has a configuration characterized in that it is synthesized with the synthesized encoded signal.

  With this configuration, audio information and video information having different properties can be handled completely separately, which facilitates handling and improves the compression rate of the code amount, particularly efficiently compressing video information. .

  Furthermore, the broadcast signal distributed storage method of the present invention is the broadcast signal distributed storage method according to claim 16, wherein the speech encoded signal storage step includes all the codes in which the storage encoded signals are stored. The encoded signal storage device stores the speech encoded signal.

  With this configuration, if one of the encoded signal storage devices can read data, broadcasting can be continued.

  Furthermore, the broadcast signal distributed storage method according to the present invention is the broadcast signal distributed storage method according to claim 16 or 17, wherein the audio encoded signal separation step includes: converting the audio information from the original encoded signal; A configuration in which all are separated as one speech encoded signal, and the speech encoded signal storage step stores the one speech encoded signal in any of the plurality of encoded signal storage devices. Have.

  With this configuration, the generation of noise due to the dispersion of speech encoded signals does not occur, and the restored speech can be made clear.

  Furthermore, in the broadcast signal transmission method of the present invention, an original encoded signal storing one content is distributed and stored in a plurality of encoded signals for storage in a plurality of encoded signal storage devices. In a broadcast signal transmission method of reading an encoded signal and transmitting a broadcast signal, the video signal is a pseudo moving image of a primary moving image that is restored from the original encoded signal by reducing the code amount of the original encoded signal. A basic encoded signal for restoring a secondary moving image and a plurality of extended encoded signals generated from information lost when converting the original encoded signal into the basic encoded signal are multiplexed in any combination. The encoded signal for storage is read from the encoded signal storage device that stores the plurality of encoded encoded signals for storage, and the basic encoded signal and the extended encoded signal are separated. A basic extended encoded signal separation step for extracting one basic encoded signal and a plurality of different extended encoded signals, and the one basic extracted in the basic extended encoded signal separation step. A synthesized encoded signal generated in the synthesized encoded signal generating step by synthesizing the encoded signal and the plurality of different extended encoded signals different from each other to generate a synthesized encoded signal; And a broadcast signal transmission step of converting the converted signal into a broadcast signal and transmitting it.

  With this configuration, even if a plurality of encoded signal storage devices fail, broadcasting can be continued by extracting data from the encoded signal storage device in which other basic encoded signals are stored.

  Furthermore, the broadcast signal transmission method of the present invention is the broadcast signal transmission method according to claim 19, wherein the basic extended encoded signal separation step is read from the plurality of encoded signal storage devices. The basic encoded signal extracted from the encoded signal is selected and extracted from the basic encoded signal with few signal errors.

  With this configuration, it is possible to select the highest quality encoded signal that does not cause any trouble in reading / writing or saving, and it is possible to reproduce the image without reducing the video quality at the time of restoration.

  Furthermore, the broadcast signal transmission method according to the present invention is the broadcast signal transmission method according to claim 19 or 20, wherein the basic extended coded signal separation step stores the storage from the plurality of coded signal storage devices. A coded signal obtained by separating voice information from the original coded signal together with the basic coded signal and the extended coded signal, and a plurality of different basic coded signals. The extended encoded signal and the speech encoded signal, and the synthesized encoded signal generation step includes the one basic encoded signal extracted in the basic extended encoded signal separation step, and It has a configuration characterized in that the synthesized coded signal is generated by synthesizing the speech coded signal with a signal obtained by synthesizing a plurality of different extended coded signals. To have.

  With this configuration, audio information and video information having different properties can be handled separately, which facilitates handling and improves the compression rate of the code amount, and in particular, efficiently compresses video information.

  The present invention generates a basic encoded signal in which a code amount of an original encoded signal is reduced and a plurality of extended encoded signals that are difference information, and the basic encoded signal and the plurality of extended encoded signals, Are stored in a plurality of encoded signal storage devices, and the storage signals are stored in the plurality of encoded signal storage devices. Reads the encoded signal, extracts one basic encoded signal and a plurality of different extended encoded signals, synthesizes them, converts them into broadcast signals, and transmits them to the original encoded signal storage devices. From an encoded signal storage device in which a basic encoded signal and an extended encoded signal having a smaller amount of code than an encoded signal are stored, and other basic encoded signals are stored even if a plurality of encoded signal storage devices fail De It is possible to continue broadcasting by retrieving data, it is also possible to reduce the storage capacity for storing data for broadcasting.

  In addition, since the present invention multiplexes and generates the basic coded signal to all the coded signals for storage, data can be read out even in one of the coded signal storage devices in which the coded signals for storage are stored. Broadcasting can be continued if it can be performed.

  Furthermore, since the present invention multiplexes the basic encoded signal and any one or more of the extended encoded signals to generate the respective encoded signals for storage, each encoded signal storage device The extended encoded signal is stored in the high-quality video as many as the number of encoded signal storage devices capable of reading data.

  Further, the present invention selects and extracts a basic encoded signal with few signal errors from the encoded signal for storage read from the plurality of encoded signal storage devices, so that there is no obstacle in reading / writing and storage. An encoded signal can be selected and reproduced without degrading the video quality at the time of restoration.

  Furthermore, the present invention separates a speech encoded signal that is a speech information signal from the original encoded signal, stores the speech encoded signal in any of the plurality of encoded signal storage devices, and Extracting the audio encoded signal from the encoded signal storage device and synthesizing the extracted audio encoded signal into the synthesized encoded signal, so that audio information and video information having different properties are completely separated and handled. This makes it easy to handle and improves the compression rate of the code amount, particularly efficiently compressing video information.

  Furthermore, the present invention stores the speech encoded signal in all the encoded signal storage devices in which the storage encoded signals are stored, so that even one of the encoded signal storage devices reads data. If you can, you can continue broadcasting.

  Furthermore, the present invention separates all of the audio information from the original encoded signal as one audio encoded signal and stores it in the encoded signal storage device, so that noise is generated due to dispersion of the audio encoded signal. There is no waking and the sound at the time of restoration can be made clear.

  Furthermore, the present invention separates a speech encoded signal, which is a speech information signal, from the original encoded signal, and the basic encoded signal from an encoded signal obtained by removing the speech encoded signal from the original encoded signal. And generating a plurality of encoded signals for storage by multiplexing the speech encoded signals together with the basic encoded signal and the plurality of extended encoded signals in any combination, and generating the plurality of encoded signals. Since the encoded signal for storage is read from the storage device, the speech encoded signal is separated together with the basic encoded signal and the extended encoded signal, and the speech encoded signal is synthesized with the synthesized encoded signal. Without providing a data separation unit or audio data extraction unit, audio information and video information having different properties can be handled separately, and handling can be facilitated.

  A broadcast signal distributed storage device according to an embodiment of the present invention will be described below with reference to the drawings. Note that this broadcast signal distributed storage device is a technology of “encoded signal separation / synthesis device” described in Japanese Patent Application No. 2003-054048 and “encoded signal separation / synthesis device” described in Japanese Patent Application No. 2003-381859. Is used to separate and synthesize the original encoded signal.

  The “encoded signal separating / synthesizing device” described in Japanese Patent Application No. 2003-054048 and Japanese Patent Application No. 2003-381859 receives a first encoded signal (original encoded signal) before code amount reduction. The first encoded signal is subjected to code amount conversion processing, converted into a second encoded signal (basic encoded signal) with a reduced code amount, and output, and the first encoded signal and the second code are also output. A stream demultiplexer that generates and outputs a plurality of extended differentially encoded signals (enhanced encoded signals) that are a part of difference information from the encoded signal, the second encoded signal, and the extended differential encoding A stream synthesizer that receives a signal and synthesizes the second encoded signal and the extended differential encoded signal to generate a combined encoded signal. Second code after reduction An encoded signal that can reproduce a video having the same quality as the first encoded signal before the code amount reduction, or higher quality than the second encoded signal, though not the same as the first encoded signal. Is what you get.

(First embodiment)
FIG. 1 is a block diagram showing a configuration of a broadcast signal distributed storage device according to the first embodiment of the present invention. In the following embodiment, information on content such as a program is input as an MPEG-TS (transport stream) as an original encoded signal. MPEG-TS is a program that can make a plurality of programs into one stream.

  As shown in FIG. 1, a broadcast signal distribution storage device 1000 includes a TS distribution unit 1100, a stream data storage unit 1200, a TS synthesis unit 1300, and a stream data decoding unit 1400, receives MPEG-TS, and stores bits. It is converted into a stream, distributed and stored in a plurality of storage devices, and further, the storage bit stream stored in a distributed manner is synthesized, converted into a broadcast signal, and output.

  A block diagram showing the configuration of the TS distribution unit 1100 is shown in FIG.

  As shown in FIG. 2, the TS distribution unit 1100 includes a base data generation unit 1120, an enhancement data generation unit 1130, and a storage data multiplexing unit 1140. The TS data is input to the MPEG-TS and is base data that is a basic encoded signal. (B) and a plurality of enhancement data (E) which are extended encoded signals are generated, the base data (B) and the plurality of enhancement data (E) are arbitrarily combined and multiplexed, and a plurality of storage data are stored. A bit stream is generated.

  Here, the base data (B) and the enhancement data (E) will be described.

  First, MPEG-TS is a bit stream that can obtain a high-quality video signal when decoded. This video is referred to as a “primary moving image”. Although this MPEG-TS can obtain high-quality video, since it has a large code amount, it does not only consume a large capacity when storing data, but also has the disadvantage that it takes time to transmit and receive data.

  In order to eliminate such an inconvenience, there is one that reduces information that is less affected even if omitted from the MPEG-TS, and converts it into a bitstream having a smaller code amount than the original MPEG-TS. This is called transcoding (code amount conversion, code amount compression). At this time, since the bit stream converted so as to reduce the code amount from MPEG-TS is the basic data, the base data (B) And Also, the video decoded from the base data (B) is referred to as “secondary moving image”. Since the “secondary moving image” is decoded from the base data (B) having a smaller code amount than the MPEG-TS, the video quality is deteriorated compared to the “primary moving image”.

  Normally, after transcoding, only the base data (B) is handled and a low-quality video is obtained. For this reason, the original video quality cannot be obtained on the receiving side after transcoding. Or, in order to obtain the original video quality, the original MPEG-TS must be received. Therefore, Japanese Patent Application No. 2003-054048 discloses that a plurality of enhancement data (E) is obtained from information in this extended layer, with information remaining by transcoding as a basic layer and information missing by transcoding as an extended layer. And “encoded signal separating / combining device” described in Japanese Patent Application No. 2003-381859.

  The information on the enhancement layer is difference information between the MPEG-TS and the base data (B). For example, there is coefficient information rounded by re-quantization at the time of transcoding. Each difference data obtained here is distributed to a plurality of pieces to generate a bitstream, whereby each enhancement data (E) can be obtained.

  Returning to the description of the TS distribution unit 1100, the base data generation unit 1120 reduces the MPEG-TS code amount and restores a secondary moving image that is a pseudo moving image of the primary moving image restored from the MPEG-TS. Base data (B) to be generated is generated and output. This process is the same as a normal transcoder.

  In addition, the base data generation unit 1120 outputs difference information between the input MPEG-TS and the generated base data (B) (information lost when converting from MPEG-TS to base data (B)). Furthermore, conversion information (compression information) when converting from MPEG-TS to base data (B) can also be output. The difference information (information lost at the time of conversion) is information that is truncated when MPEG-TS is compressed into base data (B). This information is extended layer data, and is information that remains after transcoding. Let (base data (B)) be the data of the basic hierarchy.

Here, the base data (B) is obtained by reducing the MPEG-TS code amount as described above.
(Code amount of base data (B)) <(Code amount of MPEG-TS)
It is.

  The enhancement data generation unit 1130 distributes the difference information into a plurality of pieces, and generates enhancement data (En) (n is an arbitrary integer). By synthesizing all the enhancement data (En) and the base data (B), the original MPEG-TS can be restored and the same video can be reproduced. In addition, by distributing the data of this extended hierarchy to a plurality of pieces to obtain a plurality of enhancement data (E), even if all the enhancement data (En) is not obtained, the base data (B) and the obtained enhancement are obtained. With only the data (En), it is possible to obtain a higher quality video than the video obtained from only the base data (B).

  The storage data multiplexing unit 1140 multiplexes the base data (B) generated by the base data generation unit 1120 and a plurality of enhancement data (E) generated by the enhancement data generation unit 1130 in any combination. A plurality of storage bitstreams are generated.

  Next, the stream data storage unit 1200 includes a plurality of data storage devices 1210, 1220, 1230, and 1240, and stores a plurality of storage bitstreams multiplexed by the TS distribution unit 1100.

  Data storage devices 1210, 1220, 1230, and 1240 are similar to each other and are storage devices such as HDDs. Further, the data storage devices 1210, 1220, 1230, and 1240 may be plural, and the number is not limited to the number, but is assumed to be four in the present embodiment. Furthermore, the data storage devices 1210, 1220, 1230, and 1240 may have different storage capacities.

  Each of the data storage devices 1210, 1220, 1230, 1240 stores the storage bitstream multiplexed in the storage data multiplexing unit 1140.

  A block diagram showing the configuration of the TS synthesis unit 1300 is shown in FIG.

  As shown in FIG. 3, the TS combining unit 1300 includes a storage data demultiplexing unit 1310 and a combined data generating unit 1320, and inputs a plurality of storage bitstreams stored in the stream data storage unit 1200, and base data This is divided into (B) and a plurality of enhancement data (E) and synthesized to generate a synthesized bit stream.

  A storage data demultiplexing unit 1310 reads the storage bitstream from each of a plurality of data storage devices 1210, 1220, 1230, and 1240, separates base data (B) and enhancement data (En), and provides one base Data (B) and a plurality of different enhancement data (En) are extracted.

  The combined data generation unit 1320 combines the base data (B) extracted by the storage data demultiplexing unit 1310 and the plurality of enhancement data (En) to generate a combined bitstream. . By this synthesis, it is possible to obtain the same synthesized bit stream as that of the input MPEG-TS or a synthesized bit stream that can generate a higher quality video than the video reproduced from the base data (B).

  Next, the stream data decoding unit 1400 includes a combined data decoding unit and a broadcast signal transmitting unit, decodes the combined bit stream combined by the TS combining unit 1300, converts it into a broadcast signal, and transmits it. .

  The combined data decoding unit stores and decodes the combined bit stream generated by the combined data generation unit 1320 to generate a video signal. The broadcast signal transmission unit converts the video signal generated by the combined data decoding unit into a broadcast video signal and transmits the broadcast signal.

  Next, the distributed storage and broadcast signal transmission processing operation of broadcast signal distributed storage apparatus 1000 in the present embodiment will be described.

  First, in the broadcast signal distribution storage device 1000, when MPEG-TS is input, it is taken into the base data generation unit 1120 of the TS distribution unit 1100. The base data generation unit 1120 transcodes (code amount compression) the MPEG-TS to generate and output base data (B). Furthermore, simultaneously with the generation of the base data (B), information (difference information) that is missing from the MPEG-TS is output. The difference information output from the base data generation unit 1120 is, for example, coefficient information rounded by quantization using a requantization parameter, a quantization parameter at the time of MPEG-TS generation, and the like.

  The enhancement data generation unit 1130 receives the difference information from the base data generation unit 1120 and arbitrarily divides it. Then, enhancement data (E) is generated from each divided difference information and output. Here, the difference information is divided into four pieces, and four pieces of enhancement data (E1), (E2), (E3), and (E4) are generated. Further, as a method for dividing the difference information, there are a method described in Japanese Patent Application No. 2003-054048 and a method described in Japanese Patent Application No. 2003-381859.

  In the storage data multiplexing unit 1140, the base data (B) output from the base data generation unit 1120 and the enhancement data (E1), (E2), (E3), (E4) output from the enhancement data generation unit 1130 ) Are arbitrarily combined and multiplexed to generate and output a plurality of storage bitstreams. Here, the enhancement data (E1), (E2), (E3), and (E4) are multiplexed on the base data (B), respectively, and four storage bit streams (B + E1), (B + E2), (B + E3), ( B + E4) is generated and output.

  With the above processing, the TS distribution unit 1100 converts the MPEG-TS to generate four storage bit streams (B + E1), (B + E2), (B + E3), and (B + E4).

  Subsequently, the four storage bit streams (B + E1), (B + E2), (B + E3), and (B + E4) output from the TS distribution unit 1100 are the four data storage devices 1210, 1220, and 1230 of the stream data storage unit 1200. , 1240, respectively.

  A schematic diagram simply showing the above distributed storage processing is shown in FIG. As described above, the TS data is separated into base data (B) and a plurality of enhancement data (E1 to E4), the base data (B) and the respective enhancement data (E1 to E4) are multiplexed, and each stream data The data is stored in the storage devices 1210, 1220, 1230, and 1240. Therefore, the stream data storage device 1210 has the base data (B) and the enhancement data (E1) multiplexed (B + E1), the stream data storage device 1220 has (B + E2), and the stream data storage device 1230 has ( (B + E3) and (B + E4) are stored in the stream data storage device 1240, respectively.

  Here, as described above, the base data (B) is basic data and can be played back even though only this data has video deterioration. The enhancement data (En) (1 ≦ n ≦ 4) is extended data and cannot be reproduced by itself, and can be reproduced by combining with the base data (B). Therefore, even if a failure occurs in a plurality of data storage devices 1210, 1220, 1230, and 1240, it is possible to retrieve data from the remaining devices and restore the video.

  Next, the TS synthesis unit 1300 inputs a storage bitstream from the stream data storage unit 1200. Specifically, the storage data demultiplexing unit 1310 of the TS combining unit 1300 inputs the storage bitstream (B + E1) from the data storage device 1210 of the stream data storage unit 1200, and stores the storage bitstream from the data storage device 1220. (B + E2) is input, the storage bit stream (B + E3) is input from the data storage device 1230, and the storage bit stream (B + E4) is input from the data storage device 1240. Here, for the data storage devices 1210, 1220, 1230, and 1240 that cannot be read due to a failure or the like, the input of the storage bit stream (B + En) is abandoned.

  The storage data demultiplexing unit 1310 demultiplexes the input storage bitstreams (B + E1), (B + E2), (B + E3), and (B + E4) to demultiplex the base data (B), the enhancement data (E1), ( E2), (E3), and (E4) are separated and output.

  Here, since the base data (B) is multiplexed into all the storage bit streams (B + E1), (B + E2), (B + E3), and (B + E4), four base data are separated, but one base data Only (B) needs to be output. Depending on the multiplexing method, a plurality of enhancement data (En) may be separated. In this case, only one enhancement data (En) needs to be output.

  The composite data generation unit 1320 inputs the base data (B) and the enhancement data (E1), (E2), (E3), and (E4) output from the storage data demultiplexing unit 1310, and performs the synthesis process. Generate and output a composite bitstream. At this time, if all of the enhancement data (En) can be input, the generated synthesized bitstream can restore the same bitstream as the MPEG-TS input to the broadcast signal distributed storage device 1000. In addition, even if any of the enhancement data (En) cannot be input, if the base data (B) can be input, a composite bit stream that can reproduce the original video even if there is some image degradation is generated. can do.

  Next, the stream data decoding unit 1400 receives the combined bit stream from the TS combining unit 1300. The synthesized data decoding unit of the stream data decoding unit 1400 receives the synthesized bit stream from the synthesized data generation unit 1320 of the TS synthesis unit 1300 and decodes it to generate a video signal. The video signal generated in the combined data decoding unit is input to the broadcast signal transmission unit, converted into a broadcast video signal, and transmitted.

  As described above, the TS synthesis unit 1300 can input the storage bit stream to synthesize the synthesis bit stream, and the stream data decoding unit 1400 can convert the synthesis stream to a broadcast signal and output it.

  FIG. 5 shows a schematic diagram simply showing the above synthesis process. As shown in FIG. 5, the principle of TS synthesis is based on the inverse method of dispersion, but the image quality of video that can be restored by synthesis depends on the number of storage devices (HDDs) that have successfully read data.

  For example, the data storage device 1220 that stores the storage bitstream (B + E2) obtained by combining the base data (B) and the enhancement data (E2) and the data storage device 1230 that stores the storage bitstream (B + E3) fail. In such a case, the storage bitstream is input from two units, the data storage device 1210 storing the storage bitstream (B + E1) and the data storage device 1240 storing the storage bitstream (B + E4), The video can be restored, and the restored video quality is the reproduction quality of the video decoded from the composite bit stream (B + E1 + E4).

  Further, when the code amounts (information amounts) of the enhancement data (En) are distributed and stored differently, the code amounts of the enhancement data (En) stored in a storage device that can read the data.

  Therefore, even if some of the data storage devices 1210, 1220, 1230, and 1240 that store data for broadcasting signals fail at the same time, there is still a storage device that can read data. , Can continue broadcasting without interruption.

(Second Embodiment)
FIG. 6 is a block diagram showing the configuration of the broadcast signal distributed storage device according to the second embodiment of the present invention.

  As shown in FIG. 6, the broadcast signal distribution storage device 1002 of this embodiment includes a TS distribution unit 1102, a stream data storage unit 1202, a TS synthesis unit 1302, a stream data decoding unit 1402, an audio data separation unit 1502, and an audio. A data extraction unit 1602 is provided to input MPEG-TS including audio data (A), audio data (A) is also distributed and stored in a plurality of storage devices, and broadcast signals are output.

  The TS distribution unit 1102 is the same as the TS distribution unit 1100 of the above embodiment, inputs MPEG-TS, generates a plurality of base data (B) and enhancement data (E), and generates the base data ( B) and the plurality of enhancement data (E) are arbitrarily combined and multiplexed to generate a plurality of storage bit streams.

  The stream data storage unit 1202 includes data storage devices 1212, 1222, 1232, and 1242, and each of the data storage devices 1212, 1222, 1232, and 1242 stores a bit stream for storage and also stores audio data (A). It is something that can be done.

  The TS synthesis unit 1302 includes a storage data demultiplexing unit and a synthesized data generation unit.

  The storage data demultiplexing unit is the same as the storage demultiplexing unit 1310 of the above-described embodiment, and reads the storage bitstream from each of a plurality of data storage devices 1212, 1222, 1232, 1242, and generates base data (B) and enhancement data (E) are separated, and one base data (B) and a plurality of different enhancement data (E) are extracted.

  In addition to the same function as the synthesis data generation unit 1320 of the above embodiment, the synthesis data generation unit synthesizes the voice data (A) together with the base data (B) and the plurality of enhancement data (E). .

  In addition to the same functions as the stream data decoding unit 1400 of the above embodiment, the stream data decoding unit 1402 decodes the synthesized bit stream including the audio data (A), converts it into a broadcast signal, and transmits it. . Further, the stream data decoding unit 1402 separately inputs the synthesized bit stream not including the audio data (A) and the audio data (A), decodes them, and converts the decoded video and audio into broadcast signals. And can be sent.

  The audio data separation unit 1502 receives MPEG-TS, separates audio data (A) from the MPEG-TS, and outputs the audio data (A) and MPEG-TS other than the audio data separately. is there.

  The audio data extraction unit 1602 extracts and outputs audio data (A) from each data storage device 1212, 1222, 1232, 1242 of the stream data storage unit 1202. Further, at the time of extracting the audio data (A), the audio data (A) may be read from all the data storage devices, and one audio data (A) may be selected and output, or only one data storage device. The audio data (A) may be read out from the other data storage device only when it cannot be read out from the corresponding data storage device.

  Next, the audio data distributed storage processing operation of the broadcast signal distributed storage device 1002 in this embodiment will be described.

  First, in the broadcast signal distributed storage device 1002, when MPEG-TS is input, it is taken into the audio data separation unit 1502. The audio data separation unit 1502 separates the audio data (A) from the MPEG-TS, and outputs the audio data (A) and the other MPEG-TS. Further, instead of the data obtained by separating the audio data (A) from the MPEG-TS, the MPEG-TS itself may be output.

  The processing in the TS distribution unit 1102 is the same as in the above embodiment, and the MPEG-TS excluding the audio data is input, and the base data (B) and the four enhancement data (E1), (E2), ( E3) and (E4) are generated, and these are multiplexed, and four storage bit streams (B + E1), (B + E2), (B + E3), and (B + E4) are generated and output.

  Next, in the stream data storage unit 1202, the audio data (A) output from the audio data separation unit 1502 and the four storage bit streams (B + E1), (B + E2), (B + E3) output from the TS distribution unit 1102 ) And (B + E4) are stored in the respective data storage devices 1212, 1222, 1232 and 1242. Thus, the audio data (A) and the storage bit stream (B + E1) are stored in the data storage device 1212, the audio data (A) and the storage bit stream (B + E2) are stored in the data storage device 1222, and the audio data (A ) And the storage bit stream (B + E3), and the data storage device 1242 stores the audio data (A) and the storage bit stream (B + E4).

  Therefore, even if a failure occurs in a plurality of data storage devices 1212, 1222, 1232, and 1242, it is possible to extract data from the remaining devices and restore voice. Furthermore, since the audio data (A) is smaller than the video data and due to the nature of the audio data (A), it is inevitable that noise will be generated. As described above, data is written to all the data storage devices 1212, 1222, 1232, and 1242. Of course, the audio data (A) may be written only in some storage devices instead of all of the data storage devices 1212, 1222, 1232, and 1242.

  Next, the audio data extraction unit 1602 reads out and outputs the audio data (A) from all or any of the data storage devices 1212, 1222, 1232 and 1242 of the stream data storage unit 1202. At this time, when the audio data (A) is read from all of the data storage devices 1212, 1222, 1232, and 1242, one of them is selected and output, and either one of the data storage devices 1212, 1222, 1232, 1242 is selected. When the audio data (A) is read, if the audio data (A) cannot be read from the data storage device such as the data storage device 1212, the audio data (A) is read from another data storage device such as the data storage device 1222. Is read and output.

  The TS synthesis unit 1302 inputs the bit stream for storage (B + E1), (B + E2), (B + E3), and (B + E4) from the stream data storage unit 1202, and the audio data (A) from the audio data extraction unit 1602.

  The storage data demultiplexing unit of the TS synthesis unit 1302 demultiplexes the input storage bitstreams (B + E1), (B + E2), (B + E3), and (B + E4), as in the above embodiment, and generates base data. Separated into (B) and enhanced data (E1), (E2), (E3), (E4) and output.

  The synthesis data generation unit of the TS synthesis unit 1302 inputs the base data (B) and the enhancement data (E1), (E2), (E3), and (E4) output from the storage data demultiplexing unit, as well as the voice The audio data (A) input from the data extraction unit 1602 is input, a combining process is performed, and a combined bit stream is generated and output.

  Next, the stream data decoding unit 1402 receives the combined bit stream from the TS combining unit 1302 and decodes it to generate a video signal and an audio signal. The generated video signal and audio signal are converted into a broadcast video signal and audio signal and transmitted.

  Also, the stream data decoding unit 1402 receives a synthesized bit stream that does not include the audio data (A) from the TS synthesis unit 1302, directly inputs the audio data (A) from the audio data extraction unit 1602, and decodes the video signal. It is also possible to generate an audio signal and convert the generated video signal and audio signal into a broadcast video signal and audio signal and transmit them.

  As described above, it is possible to continue broadcasting including audio data even for a plurality of simultaneous data storage device (HDD) failures.

(Third embodiment)
Further, another configuration of the broadcast signal distributed storage device for storing the audio data (A) will be described. The configuration of the broadcast signal distribution storage device in the third embodiment of the present invention is the same as that of the broadcast signal distribution storage device 1000 shown in FIG. 1, and the TS distribution unit 1100 and the TS synthesis unit 1300 are The TS dispersion unit 1103 and the TS composition unit 1303 shown in FIGS. 7 and 8 are used.

  As shown in FIG. 7, the TS distribution unit 1103 includes a base data generation unit 1123, an enhancement data generation unit 1133, and a storage data multiplexing unit 1143, and inputs MPEG-TS, base data (B), and a plurality of Enhancement data (E) and voice data (A) are generated, and the base data (B), the plurality of enhancement data (E), and the voice data (A) are arbitrarily combined and multiplexed. To generate a plurality of storage bitstreams.

  The base data generation unit 1123 generates and outputs audio data (A) and base data (B) with a reduced MPEG-TS code amount. Further, the base data generation unit 1123 outputs difference information between the input MPEG-TS and the generated base data (B).

  The enhancement data generation unit 1133 is the same as the enhancement data generation unit 1130. The enhancement data generation unit 1133 distributes the difference information into a plurality of pieces and generates enhancement data (En).

  The storage data multiplexing unit 1143 includes the base data (B) and audio data (A) generated by the base data generation unit 1123, and a plurality of enhancement data (E) generated by the enhancement data generation unit 1133. A plurality of bitstreams for storage are generated by arbitrarily combining and multiplexing.

  The stream data storage unit 1200 includes a plurality of data storage devices 1210, 1220, 1230, and 1240. Each of the data storage devices 1210, 1220, 1230, and 1240 is multiplexed with the audio data (A) in the storage data multiplexing unit 1143. Each of the stored bitstreams for storage is stored.

  As shown in FIG. 8, the TS combining unit 1303 includes a storage data demultiplexing unit 1313 and a combined data generating unit 1323, and inputs a plurality of storage bitstreams stored in the stream data storage unit 1200, and base data (B), a plurality of enhancement data (E), and audio data (A) are divided and combined to generate a combined bit stream.

  The storage data demultiplexing unit 1313 reads storage bitstreams from a plurality of data storage devices 1210, 1220, 1230, and 1240, and separates base data (B), enhancement data (En), and audio data (A). One base data (B), a plurality of different enhancement data (En), and one audio data (A) are extracted.

  The synthesized data generating unit 1323 synthesizes the base data (B) extracted by the storage data demultiplexing unit 1313, the plurality of enhanced data (En), and the audio data (A), and synthesizes them. A bit stream is generated.

  With such a configuration, the TS distribution unit 1103 generates a storage bitstream including the audio data (A) from the MPEG-TS, and each data storage device 1210, 1220, 1230, 1240 of the stream data storage unit 1200. The bit stream for storage in which video and audio are multiplexed is stored. In the TS synthesizing unit 1303, the storage bit stream is once separated into each data to generate a synthesized bit stream.

  Therefore, it is possible to continue broadcasting including audio data even when a plurality of data storage device (HDD) failures occur simultaneously, without providing an audio data separation unit and an audio data extraction unit.

  As described above, the broadcast signal distributed storage device and the broadcast signal transmission device according to the present invention are capable of receiving other basic encoded signals (base data (base data)) even if a plurality of encoded signal storage devices (data storage devices) fail. B)) has the effect that broadcasting can be continued by extracting data from the encoded signal storage device in which the data is stored, and the storage capacity for storing data for broadcasting can be reduced. It is useful as a storage device and transmission device for broadcast signals for storing programs for broadcast use.

It is a block diagram which shows the signal distribution storage apparatus for broadcasting in the 1st Embodiment of this invention. It is a block diagram which shows the TS dispersion | distribution part in the 1st Embodiment of this invention. It is a block diagram which shows the TS synthetic | combination part in the 1st Embodiment of this invention. It is a schematic diagram which shows the distributed storage process in the 1st Embodiment of this invention. It is a schematic diagram which shows the synthetic | combination process in the 1st Embodiment of this invention. It is a block diagram which shows the signal distribution storage apparatus for broadcasting in the 2nd Embodiment of this invention. It is a block diagram which shows the TS dispersion | distribution part in the 3rd Embodiment of this invention. It is a block diagram which shows the TS synthetic | combination part in the 3rd Embodiment of this invention. It is a system configuration diagram showing RAID 0 (when there are four HDDs) of conventional disk array technology. It is a system block diagram which shows RAID1 (two HDDs) of the conventional disk array technology. It is a system configuration diagram showing RAID 5 (when there are four HDDs) of conventional disk array technology. It is a system configuration diagram showing a conventional disk array control device (three HDDs).

Explanation of symbols

5 System Bus 6 Disk Array Controller 7 Disk Controller 11 Tape Drive 20 RAID 0 0th HDD
21 RAID0 first HDD
22 RAID 0 second HDD
23 RAID 0 third HDD
30 0th HDD in RAID1
31 RAID 1 first HDD
40 0th HDD in RAID5
41 First HDD in RAID5
42 RAID 5 second HDD
43 RAID5 third HDD
50 disk array control device 51 disk array control circuit 52 switching circuit 53 0th HDD of the disk array
54 The first HDD in the disk array
55 Second HDD in disk array
1000, 1002 Broadcast signal distribution storage device 1100, 1102, 1103 TS distribution unit 1120, 1123 Base data generation unit 1130, 1133 Enhancement data generation unit 1140, 1143 Storage data multiplexing unit 1200, 1202 Stream data storage unit 1210, 1220 1230, 1240,
1212, 1222, 1232, 1242 Data storage devices 1300, 1302, 1303 TS synthesis units 1310, 1313 Storage data demultiplexing units 1320, 1323 Synthesis data generation units 1400, 1402 Stream data decoding unit 1502 Audio data separation unit 1602 Audio data extraction Part

Claims (21)

In a broadcast signal distributed storage device that distributes and stores an original encoded signal containing one content in a plurality of encoded signal storage devices and transmits a broadcast signal,
Basic encoded signal generation for generating a basic encoded signal for reducing a code amount of the original encoded signal and restoring a secondary moving image that is a pseudo moving image of the primary moving image restored from the original encoded signal Means,
Extended encoded signal generating means for generating a plurality of extended encoded signals from information lost when converting the original encoded signal to the basic encoded signal;
An encoded signal multiplexing means for multiplexing the basic encoded signal and a plurality of the extended encoded signals in an arbitrary combination and generating a plurality of encoded signals for storage;
Encoded signal storage means for storage for storing the plurality of encoded signals for storage including the basic encoded signal in the encoded signal storage devices, respectively.
The storage encoded signal is read from the plurality of encoded signal storage devices, the basic encoded signal and the extended encoded signal are separated, and one basic encoded signal and a plurality of different extended codes A basic extended encoded signal separating means for extracting the encoded signal;
A synthesized encoded signal generating unit that generates a synthesized encoded signal by synthesizing the one basic encoded signal extracted by the basic extended encoded signal separating unit and the plurality of different extended encoded signals. When,
Broadcast signal transmitting means for converting the composite encoded signal generated by the composite encoded signal generating means into the broadcast signal and transmitting the signal;
A broadcast signal distributed storage device comprising: The broadcast signal distributed storage device according to claim 1,
The broadcast signal distributed storage device, wherein the encoded signal multiplexing means multiplexes and generates the basic encoded signal on all the encoded signals for storage. The broadcast signal distributed storage device according to claim 2.
The encoded signal multiplexing means multiplexes the basic encoded signal and any one or more of the extended encoded signals, and generates the respective encoded signals for storage. Signal distributed storage device. The broadcast signal distributed storage device according to any one of claims 1 to 3,
The basic extended encoded signal separation means selects a basic encoded signal with few signal errors from among the basic encoded signals extracted from the encoded signals for storage read from the plurality of encoded signal storage devices. A broadcast signal distributed storage device characterized by being extracted. The broadcast signal distributed storage device according to any one of claims 1 to 4,
Speech encoded signal separating means for separating a speech encoded signal that is a signal of speech information from the original encoded signal;
Speech encoded signal storage means for storing the separated speech encoded signal in any of the plurality of encoded signal storage devices;
Voice encoded signal extraction means for extracting the voice encoded signal from the plurality of encoded signal storage devices,
The broadcast signal distributed storage device, wherein the synthesized coded signal generating unit synthesizes the speech coded signal extracted by the speech coded signal extracting unit with the synthesized coded signal. The broadcast signal distributed storage device according to claim 5,
The broadcast signal distributed storage device, wherein the speech encoded signal storage means stores the speech encoded signal in all the encoded signal storage devices in which the storage encoded signals are stored. The broadcast signal distributed storage device according to claim 5 or 6,
The speech encoded signal separating means separates all of the speech information from the original encoded signal as one speech encoded signal;
The broadcast signal distributed storage device, wherein the speech encoded signal storage means stores the one speech encoded signal in any of the plurality of encoded signal storage devices. The broadcast signal distributed storage device according to any one of claims 1 to 4,
The basic encoded signal generating means separates a speech encoded signal that is a signal of speech information from the original encoded signal, and removes the speech encoded signal from the original encoded signal and generates the basic encoded signal. Generate an encoded signal,
The encoded signal multiplexing means multiplexes the speech encoded signal with any combination of the basic encoded signal and the plurality of extended encoded signals, and generates the plurality of storage encoded signals,
The basic extension encoded signal separation means reads the storage encoded signal from the plurality of encoded signal storage devices, separates the speech encoded signal together with the basic encoded signal and the extended encoded signal, Extracting the two basic encoded signals, the plurality of different extended encoded signals, and the audio encoded signal,
The broadcast signal distributed storage device, wherein the synthesized coded signal generating means synthesizes the speech coded signal extracted by the basic extended coded signal separating means with the synthesized coded signal. An original encoded signal containing one content is distributed and stored in a plurality of storage encoded signals in a plurality of encoded signal storage devices, and the storage encoded signal is read and a broadcast signal is transmitted. In a broadcast signal transmitter,
From the original encoded signal, a basic encoded signal for reducing a code amount of the original encoded signal and restoring a secondary moving image that is a pseudo moving image of the primary moving image restored from the original encoded signal, and From encoded signal storage devices each storing a plurality of storage encoded signals multiplexed by arbitrarily combining a plurality of extended encoded signals generated from information lost when converting to the basic encoded signal Reading the encoded signal for storage, separating the basic encoded signal and the extended encoded signal, and extracting one basic encoded signal and a plurality of different extended encoded signals from each other Extended encoded signal separation means;
Synthetic coded signal generation for synthesizing the one basic coded signal extracted by the basic extended coded signal separating means and the plurality of different extended coded signals from each other to generate a synthesized coded signal Means,
Broadcast signal transmitting means for converting the composite encoded signal generated by the composite encoded signal generating means into a broadcast signal and transmitting it,
A broadcast signal transmitting apparatus comprising: The broadcast signal transmission device according to claim 9,
The basic extended encoded signal separation means selects a basic encoded signal with few signal errors from among the basic encoded signals extracted from the encoded signals for storage read from the plurality of encoded signal storage devices. A broadcast signal transmitter characterized by extracting. In the broadcast signal transmitting apparatus according to claim 9 or 10,
The basic extended encoded signal separation means reads the encoded signal for storage from the plurality of encoded signal storage devices, and separates speech information from the original encoded signal together with the basic encoded signal and the extended encoded signal. Separating the encoded speech signal, and extracting one basic encoded signal, a plurality of different extended encoded signals, and the encoded speech signal,
The synthesized encoded signal generating means generates the speech code into a signal obtained by synthesizing the one basic encoded signal extracted by the basic extended encoded signal separating means and the plurality of different extended encoded signals. A broadcast signal transmitting apparatus characterized in that a synthesized encoded signal is generated by synthesizing a synthesized signal. In a broadcast signal distributed storage method in which an original encoded signal containing one content is distributed and stored in a plurality of encoded signal storage devices, and a broadcast signal is transmitted.
Basic encoded signal generation for generating a basic encoded signal for reducing a code amount of the original encoded signal and restoring a secondary moving image that is a pseudo moving image of the primary moving image restored from the original encoded signal Steps,
An extended encoded signal generating step for generating a plurality of extended encoded signals from information lost when converting the original encoded signal to the basic encoded signal;
An encoded signal multiplexing step for multiplexing the basic encoded signal and a plurality of the extended encoded signals in an arbitrary combination and generating a plurality of encoded signals for storage;
A storage encoding signal storage step of storing a plurality of storage encoding signals including a plurality of storage encoding signals including the basic encoding signal in the plurality of encoding signal storage devices, respectively;
The storage encoded signal is read from the plurality of encoded signal storage devices, the basic encoded signal and the extended encoded signal are separated, and one basic encoded signal and a plurality of different extended codes A basic extended encoded signal separation step for extracting the encoded signal;
A synthesized encoded signal generating step for generating a synthesized encoded signal by synthesizing the one basic encoded signal extracted in the basic extended encoded signal separating step and the plurality of different extended encoded signals. When,
A broadcast signal transmission step of converting the composite encoded signal generated in the synthetic encoded signal generation step into the broadcast signal and transmitting the signal;
A broadcast signal distributed storage method comprising: The broadcast signal distributed storage method according to claim 12,
The broadcast signal distributed storage method, wherein the encoded signal multiplexing step generates the basic encoded signal by multiplexing all the encoded signals for storage. The broadcast signal distributed storage method according to claim 13,
The encoded signal multiplexing step multiplexes the basic encoded signal and any one or more of the extended encoded signals, and generates the respective encoded signals for storage. Signal distributed storage method. The broadcast signal distributed storage method according to any one of claims 12 to 14,
The basic extended encoded signal separation step selects a basic encoded signal with few signal errors from among the basic encoded signals extracted from the encoded signals for storage read from the plurality of encoded signal storage devices. A broadcast signal distributed storage method characterized by extracting. The broadcast signal distributed storage method according to any one of claims 12 to 15,
A speech encoded signal separation step for separating a speech encoded signal that is a signal of speech information from the original encoded signal;
A speech encoded signal storage step of storing the separated speech encoded signal in any of the plurality of encoded signal storage devices;
A speech encoded signal extraction step for extracting the speech encoded signal from the plurality of encoded signal storage devices,
The broadcast signal distributed storage method characterized in that the synthesized coded signal generating step synthesizes the speech coded signal extracted in the speech coded signal extracting step with the synthesized coded signal. The broadcast signal distributed storage method according to claim 16,
The broadcast signal distributed storage method, wherein the speech encoded signal storage step stores the speech encoded signal in all the encoded signal storage devices in which the storage encoded signals are stored. The broadcast signal distributed storage method according to claim 16 or 17,
The speech encoded signal separation step separates all of the speech information from the original encoded signal as one speech encoded signal;
The broadcast signal distributed storage method, wherein the speech encoded signal storage step stores the one speech encoded signal in any of the plurality of encoded signal storage devices. An original encoded signal containing one content is distributed and stored in a plurality of storage encoded signals in a plurality of encoded signal storage devices, and the storage encoded signal is read and a broadcast signal is transmitted. In the broadcasting signal transmission method,
From the original encoded signal, a basic encoded signal for reducing a code amount of the original encoded signal and restoring a secondary moving image that is a pseudo moving image of the primary moving image restored from the original encoded signal, and From encoded signal storage devices each storing a plurality of storage encoded signals multiplexed by arbitrarily combining a plurality of extended encoded signals generated from information lost when converting to the basic encoded signal Reading the encoded signal for storage, separating the basic encoded signal and the extended encoded signal, and extracting one basic encoded signal and a plurality of different extended encoded signals from each other An extended encoded signal separation step;
Synthetic coded signal generation for synthesizing the one basic encoded signal extracted in the basic extended encoded signal separation step and the plurality of different extended encoded signals from each other to generate a combined encoded signal Steps,
A broadcast signal transmitting step of converting the composite encoded signal generated in the composite encoded signal generating step into a broadcast signal and transmitting the signal;
A broadcast signal transmission method comprising: The broadcast signal transmission method according to claim 19,
The basic extended encoded signal separation step selects a basic encoded signal with few signal errors from among the basic encoded signals extracted from the encoded signals for storage read from the plurality of encoded signal storage devices. A broadcast signal transmission method characterized by extracting. The broadcast signal transmission method according to claim 19 or 20,
The basic extended encoded signal separation step reads the storage encoded signal from the plurality of encoded signal storage devices, and separates speech information from the original encoded signal together with the basic encoded signal and the extended encoded signal. Separating the encoded speech signal, and extracting one basic encoded signal, a plurality of different extended encoded signals, and the encoded speech signal,
In the synthesized encoded signal generation step, the speech code is combined with a signal obtained by synthesizing the one basic encoded signal extracted in the basic extended encoded signal separation step and the plurality of different extended encoded signals. A broadcast signal transmission method characterized in that a synthesized encoded signal is generated by synthesizing a synthesized signal.

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