JP2006014238A - Digital broadcast receiving device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a digital broadcast receiving device capable of being viewed by reproducing after easily recording a desired data broadcast portion. <P>SOLUTION: When indication of content recording is given to the receiving device while data broadcast content being viewed and listened, data broadcast content data processed by a data carousel reception processing unit 12 is developed to a data recording unit 13, and the data recording unit 13 is designed to record the data to a recoding device 14. On the other hand, when an indication of reproducing the data broadcast content recorded relating to the receiving device from a viewer, the data broadcast content read from the recording device 14 is to be stored into a content buffer 15, and to be presented after being interpreted and processed by a BML browser 16. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a digital broadcast receiver capable of receiving a data broadcast.

  A digital broadcast receiver that receives digital broadcasts using satellites (CS, BS) or terrestrial waves selects any broadcast wave from a plurality of broadcast waves received through a dedicated antenna or terrestrial antenna by a tuner. Then, an arbitrary channel is selected from among a plurality of channels included in the selected broadcast wave by demultiplexing processing, a digital signal of the selected channel is taken out, and a video / audio signal is output by decoding it. .

  In such digital broadcasting, data broadcasting is performed in addition to video / audio broadcasting of programs. In the receiver that receives the data broadcast, after the channel selection process, the data broadcast reception data is stored in the cache memory and an image is displayed based on the data broadcast reception data. Since the capacity of the cache memory is limited, data exceeding the capacity is erased from the oldest one.

As a conventional technique related to data broadcasting, there is one that stores a viewing history of data broadcasting (see Patent Document 1). When recording data broadcast content, use a recording device such as D-VHS to record in a format that includes not only data broadcast content but also all data such as video, audio, and subtitle stream data. become.
JP 2002-44547 A

  In the conventional technology, as described above, when recording data broadcasting contents, it is necessary to record in a format including all data, which requires a huge recording capacity, and a large capacity recording medium is required. It is necessary to prepare. For this reason, it has not been possible to easily reproduce and view a desired data broadcast portion later.

  In view of the above circumstances, an object of the present invention is to provide a digital broadcast receiver capable of easily recording a desired data broadcast portion and reproducing and viewing it later.

  In order to solve the above-described problems, a digital broadcast receiving apparatus according to the present invention is a digital broadcast receiving apparatus capable of interpreting and displaying data broadcast content obtained by receiving digital broadcast while the data broadcast is being viewed. Means for determining whether or not a predetermined key has been operated; storage means for storing the content of the data broadcast when it is determined that a predetermined key has been operated; and interpreting and displaying the content read from the storage means And means for carrying out the above.

  In the digital broadcast receiving apparatus configured as described above, the data broadcast content being displayed when the predetermined key is operated may be recorded. Alternatively, a series of data broadcast contents from when the predetermined key is operated until the end of the data broadcast program may be recorded without being overwritten. Further, the digital broadcast receiving apparatus configured as described above may be configured to output the program video currently being received and to display an image based on the data broadcast content read from the storage unit so as to be superimposed on the program video. Good.

  According to the present invention, since the data broadcast content is recorded instead of the entire stream, a large-capacity recording medium is not necessary. In addition, since the data broadcast content at the time pointed by the user is recorded, the user can record a desired data screen at the time of viewing the data broadcast, and it is possible to reproduce the data later and watch the data screen carefully. .

  A digital broadcast receiver according to an embodiment of the present invention will be described below with reference to FIGS.

  “TS” shown in FIG. 1 is a transport stream, and is output from a tuner (not shown). The tuner extracts a signal having a specific frequency from the received high frequency digital modulation signal. Further, the tuner includes a demodulation circuit, a deinterleave circuit, an error correction circuit, and the like, thereby demodulating the selected digital modulation signal and outputting the transport stream.

  The PID (packet ID) filter 1 separates the transport stream received from the tuner into, for example, a stream such as an MPEG2 (Moving Picture Experts Group 2) video stream or audio stream, and section data. The section filter 9 separates the section data into PSI / SI (Program Specific Information / Service Information) and a data carousel.

  The audio decoder 4 decodes the encoded signal output from the PID filter 1, further D / A converts it to generate an audio signal, and supplies the audio signal to an audio output unit (speaker or the like) 5. The video decoder 2 decodes the input encoded signal to obtain a quantization coefficient and a motion vector, performs inverse DCT conversion, motion compensation control based on the motion vector, and the like, and outputs video data. The scaler 3 inputs the video data and adjusts the size and resolution of the image. The caption decoder 6 decodes the caption data in the stream to generate character data.

  The PSI / SI processing unit 10 inputs PSI / SI and performs processing so that it can be used for EPG (Electronic Program Guide) or the like. The SI storage memory 11 stores the processing information of the SI. The data carousel reception processing unit 12 processes the data carousel separated by the section filter 9 to acquire data broadcast content, and supplies the data broadcast content to the data recording unit 13 and the content buffer 15. The data recording unit 13 records data broadcast content on a recording device (semiconductor memory (volatile memory, nonvolatile memory), built-in or external hard disk, recordable DVD, etc.) 14 and data broadcast content from the recording device 14. The process which reads is performed. The content buffer (cache) 15 temporarily stores the data broadcast content and performs an overwrite process of the updated data broadcast content. The mono media decoder 17 outputs an image obtained by decoding single compressed image data or the like.

  The BML browser 16 is activated in the data broadcast display. Data display in program-linked data broadcasting is performed, for example, when it is detected that a data broadcasting display key (d key) provided on a remote control transmitter (not shown) is pressed. In data broadcasting, an attempt is first made to acquire a startup module (moduleID = 0) included in an entry component, and a screen is created based on the obtained startup document. Then, when the user operates various buttons (such as “weather forecast” and “news”) on the startup screen, the lower layer display is executed.

  Further, the BML browser 16 requests the content buffer 15 for a document (data) to be displayed. If the requested data exists, the content buffer 15 reads the data and passes it to the BML browser 16. If there is no requested data, the data carousel reception processing unit 12 extracts it from the transport stream. The data carousel reception processing unit 12 takes out data transmitted by a DSM-CC (digital storage media command and control) method.

  A frame memory (OSD: on-screen display) 7 inputs the received image data from the scaler 4, the caption data from the caption decoder 6, the data from the monomedia decoder 17, and the data from the BML browser 16, and receives each plane. Then, the synthesized video data is supplied to the video output unit (liquid crystal display or the like) 8.

In the BML document, each module transmitted by the data carousel method uses the following name space to uniquely identify each module. arib-dc: // <original_network_id>. <transport_stream_id>. <service_id>[;content_id>] [. <event_id>] / <component_tag> / <moduleName> [/ <resourceName >]
The original_network_id is an identifier unique to the network, and identifies the ground, BS, and CS. transport_stream_id is assigned to the TS. In terrestrial digital broadcasting, the same value as the network_id value is used. service_id is an identifier for identifying each service in the network. component_tag is a base point of contents such as weather forecasts and news, and data is stored after this tag. Components, arrays, image data, etc. that make up the content are stored under moduleName.

  A CPU (not shown) performs overall control in the digital broadcast receiving apparatus. In particular, as control according to the present invention, recording processing based on a user instruction for data broadcast content is performed. That is, when the CPU detects that the user has pressed the “content recording” key provided in the remote control transmitter, for example, during the presentation of the data broadcast, the content that becomes one segment on the data broadcast is stored in the recording device 14. Processing for recording is performed. That is, when the user encounters a content to be recorded while viewing the data broadcast, the user may press the “content recording” key. Further, for example, when the CPU detects that the “content reproduction” key provided in the remote control transmitter has been pressed, the CPU reads out a piece of content from the recording device 14 and supplies the content to the BML browser 16. As a result, while the user is viewing the data broadcast, it is possible to record the content that the user wants to record, and to reproduce the content later and view it carefully.

  As described above, the data broadcasting content is transmitted by the DSM-CC data carousel system defined by ARIB STD-B24, and unlike the stream type transmission system such as video / audio, the same data is repeated for a certain period. By sending the data, the receiver can acquire data at an arbitrary timing. Here, a set of data repeatedly transmitted is called a data carousel (see FIG. 2), and each data is called a module. The data carousel is composed of two types, DII (see FIG. 3) and DDB.

  A channel corresponding to a channel in normal broadcasting is called a service. Each service includes a plurality of components, and each component includes a plurality of modules. Each service is uniquely identified by a service identification (service_id), each component is uniquely identified by a component identification (component_tag) within the service, and each module is uniquely identified by a module identification (module_id) within the component (Ie, the module is uniquely identified by service_id / component_tag / module_id).

  According to the name space described above, each module can be regarded as being stored in the content buffer 15 according to the directory structure shown in FIG.

  The content recording process by the CPU will be described in some detail. When a content recording instruction is given to the receiving device while viewing the data broadcast content, the data broadcast content data processed by the data carousel reception processing unit 12 is developed in the data recording unit 13 and the data recording unit 13 Writes to the recording device 14. On the other hand, when an instruction to reproduce the recorded data broadcast content is given from the viewer to the receiver, the data broadcast content read from the recording device 14 is stored in the content buffer 15 and is displayed by the BML browser 16. Interpreted, processed and presented.

  Here, as described above, the component transmits directory information called DII (DownloadInfoIndication) and a plurality of modules serving as data entities. These data are repeatedly transmitted. Modules required for presentation of data broadcast are stored in the content buffer 15 in the receiving device, and modules that are no longer needed are deleted from the content buffer 15.

  The DII is updated when the total number of modules included in the data carousel changes, when at least one module is updated, and when local content is switched. In order to identify the version of DII, DII includes a transaction identification (transaction_id). If there is a change in the contents of DII, transaction_id is updated (incremented by 1). Further, when the version of the module changes, the module that has been transmitted before that becomes unnecessary, and a new version of the module is received. The DII also includes a data event identification (data_event_id).

  The content transmitted in the data carousel may be updated in time. A meaningful piece of content transmitted in a certain period of time is called local content. When the local content is switched, all modules transmitted before switching are not required. The data event identification (data_event_id) identifies local content and is updated when the local content is switched.

  By the above mechanism, the receiving apparatus can monitor the DII to know which module is currently transmitted and recognize the update of the module, so that the content buffer 15 in the receiving apparatus is always in the latest state. Can be kept.

  On the other hand, in the content recording process by the user instruction, the data broadcast content at the time of the user instruction is recorded in the recording device 14. For example, the content of the content buffer 15 at that time (a plurality of BML documents constituting one data broadcasting service) is equivalent to being recorded on the recording device 14, and then the content of the content buffer 15 is updated. This does not mean that the stored content of the recording device 14 is updated. Here, assuming that one segment of content is a plurality of BML documents constituting one data broadcasting service, a method in which the data carousel reception processing unit 12 extracts one carousel and records it on the recording device 14 may be adopted. Alternatively, a method of transferring data in the content buffer 15 at the time of a recording instruction by the user to the recording device 14 via the data recording unit 13 may be adopted. In addition, assuming that one segment of content is a BML document currently used by the BML browser 16, a method of transferring the used BML document at the time of a recording instruction by the user from the content buffer 15 to the recording device 14 can also be adopted.

  Playback from the recording device 14 is performed so that the viewer can play back all the modules included in the recorded data broadcast content different from the service while viewing the video and audio of any service being broadcast. During this time, it is preferable to invalidate the DII confirmation of the selected service. Further, in the reproduction of recorded content, when there are a plurality of contents (according to a recording instruction by the user a plurality of times), for example, the reproduction is performed in the oldest order every time the direction key (cross key) of the remote controller transmitter is pressed Alternatively, a list of recorded contents may be displayed, and a process of reproducing contents specified by a user's cursor movement operation and enter key operation may be performed.

  Further, in the above example, the single-shot recording in which the data broadcasting content at that time is recorded every time the recording operation is performed by the user is exemplified, but the data broadcasting content may be recorded in units of programs. That is, recording of local content when a recording instruction is issued by the user, recording of an addition / update module at the time of subsequent DII update (not overwriting), recording of local content at the time of updating data event identification (data_event_id) (overwriting) Are sequentially performed on the recording device 14. When the program end time comes, the recording process ends. During playback, a series of data broadcasting contents may be used to display an image reflecting the update by operating a key indicating “next” by a predetermined time interval (for example, every 3 seconds) or by the user. It is.

It is a block diagram which shows the digital broadcast receiver of embodiment of this invention. It is explanatory drawing which showed the data carousel. It is explanatory drawing which showed DII. It is explanatory drawing which showed the memory structure in a content buffer.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 PID filter 9 Section filter 12 Data carousel reception process part 13 Data recording part 14 Recording device 15 Content buffer 16 BML browser

Claims (4)

In a digital broadcast receiving apparatus capable of interpreting and displaying data broadcast contents obtained by receiving digital broadcast, means for determining whether or not a predetermined key is operated during viewing of the data broadcast, and operation of the predetermined key A digital broadcast receiving apparatus comprising: storage means for storing the content of the data broadcast, and means for interpreting and displaying the content read from the storage means when it is determined that the content has been made. 2. The digital broadcast receiving apparatus according to claim 1, wherein the data broadcast content being displayed when the predetermined key is operated is recorded. 2. The digital broadcast receiving apparatus according to claim 1, wherein a series of data broadcast contents from when the predetermined key is operated until the end of the data broadcast program is recorded without being overwritten. 4. The digital broadcast receiver according to claim 1, wherein a program video currently being received is output, and an image based on the data broadcast content read from the storage means is superimposed on the program video. A digital broadcast receiving apparatus configured to

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