JP4210997B2 - Digital broadcast receiver - Google Patents

Description

  The present invention relates to a digital broadcast receiving apparatus capable of receiving a digital broadcast signal, and more particularly, a digital broadcast receiving apparatus equipped with a plurality of tuners and capable of recording a channel selected at the same time as viewing an arbitrarily selected channel. About.

In a digital broadcast receiving apparatus capable of viewing or recording services of a plurality of channels from received digital broadcasts, the user can freely select a channel while recording program contents of arbitrarily selected channels. You can watch the program content of the channel. A digital broadcast receiving apparatus having such a function is described in, for example, Japanese Patent Application Laid-Open No. 11-331721.
Japanese Patent Laid-Open No. 11-331721

As described above, it is a common operation to perform a channel selection operation to view other program content while recording program content of a channel selected arbitrarily in general. In some cases, the user may not want to watch the content being recorded, even if it is a little at that time.
However, in the conventional digital broadcast receiving apparatus, the program content of the selected channel, such as when the user does not perform the channel selection operation with particular care, or when the channel being recorded is selected due to an erroneous operation, etc. If the user cannot easily recognize that the recording is currently being recorded, there is a problem that the user is viewing the recorded content against the user's will.

  Therefore, the present invention has been made to solve the problems associated with the conventional digital broadcast receiving apparatus, and while recording program content of a channel arbitrarily selected by a user, It is determined whether or not the program content of an arbitrarily selected viewing channel is the same, and based on the result, warning information is displayed on the video display device on which the content to be viewed is displayed. An object of the present invention is to provide a digital broadcast receiving device that calls attention.

The present invention is constituted by the following means in order to solve the above-described problems.
In a digital broadcast receiving apparatus that receives a digital broadcast signal including video information, audio information, and character / graphic information, an input I / F unit to which viewing channel information and recording channel information are supplied, and the incoming digital broadcast A first channel for selecting a signal, demodulating the selected digital broadcast signal, and correcting an error of the demodulated data to generate a first or second transport stream (TS). For the first TS supplied from the first tuner unit and the second tuner unit, the video, audio, and data streams corresponding to the viewing program are separated, while the other TS is supplied from the external recording / reproducing device. The video, audio and data streams are separated from the partial transport stream (partial TS), and the separated streams are separated. A demultiplexing unit for selecting any one of the two programs, a partial TS generation unit for generating a partial TS for recording in the recording / reproducing apparatus for the second TS supplied from the second tuner unit, and A video decoding unit and an audio decoding unit for decoding video and audio streams supplied from the demultiplexing unit to generate video and audio data, and a decoding process for the data stream supplied from the demultiplexing unit to generate text or audio data A decoding means for outputting graphics, a comparison means for outputting match flag data if the viewing channel information and the recording channel information are the same, and the text or graphics based on the match flag data Generated on-screen data An on-screen display control unit, a video signal processing unit that generates a video signal by synthesizing the generated on-screen data and the video data supplied from the video decoding unit, and a signal supplied from the audio decoding unit A digital broadcast receiving apparatus comprising: an audio signal processing unit that converts audio data into an audio signal.

  According to the digital broadcast receiving apparatus of the present invention, when the program content of an arbitrarily selected channel is recorded while the program content of the arbitrarily selected channel that the user desires to view later is recorded, the user operation is performed. If the content of the recording channel matches the content of the viewing channel and the currently recorded program is displayed on the video display device, the caution information that informs the user at the same time is clearly indicated. It is possible to immediately recognize that the program of the selected viewing channel is currently being recorded, and there is an effect of preventing the user from continuing to watch the recorded program unexpectedly.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing the overall configuration of a digital broadcast receiving apparatus according to the present invention. In FIG. 1, reference numeral 1 denotes a receiving unit that receives a digital broadcast signal composed of video information, audio information, and character / graphic information, and 2 selects a channel for the digital broadcast signal received by the receiving unit 1. A first demodulated signal is demodulated into digital data to correct an error, and if this data is scrambled data, descramble processing is performed and a transport stream (hereinafter referred to as TS) is output. The tuner unit 3 is a second tuner unit having the same function as the first tuner unit, and 4 is a partial TS extracted from the TS supplied from the second tuner unit 3 only corresponding to the recording channel. Partial TS generation unit that generates a transport stream (hereinafter referred to as partial TS), 5 is partial TS generation A recording / reproduction control unit 6 that outputs the partial TS generated by the unit 4 to a recording / reproducing device 16 to be described later, and supplies a reproducing partial TS supplied from the recording / reproducing device 16 to a demultiplexing unit 6 to be described later; For the TS supplied from the first tuner unit 2, the video stream, audio stream, and data stream corresponding to the viewing channel are separated, while the playback partial TS supplied from the other recording / playback control unit 5 is displayed as video. A demultiplexing unit that separates the stream, the audio stream, and the data stream, and outputs any one of the streams corresponding to the separated viewing channels and the streams corresponding to the reproduction partial TS; and 7, a demultiplexing unit The video stream supplied from 6 is decoded, converted into video data, and output. A decoding unit 8 is a video signal processing unit 9 that synthesizes the video data supplied from the video decoding unit 7 and on-screen data supplied from an on-screen display control unit 13 to be described later, and outputs a video signal. An audio decoding unit that decodes the audio stream supplied from the demultiplexing unit 6 to convert the audio stream into audio data and outputs the audio data, and 10 an audio signal processing unit that converts the audio data supplied from the audio decoding unit 9 into an audio signal , 11 is an input I / F unit for supplying control information input from the outside of the digital broadcast receiving apparatus to a system control unit 12 to be described later, and 12 is a first tuner unit 2 and a second tuner based on the control information. Controls the tuner unit 3, the partial TS generation unit 4, the recording / reproduction control unit 5, the demultiplexing unit 6, the input I / F unit 11, or the on-screen display control unit 13. A system control unit 13 that decodes the data stream supplied from the demultiplexing unit 6 with its own decoding software and supplies text or graphics to an on-screen display control unit 13 to be described later. Or an on-screen display control unit that synthesizes graphics and caution text of attention information held by itself and supplies the video signal processing unit 8 with only the caution text as the on-screen data or the on-screen data; Is a video display device that displays the video signal supplied from the video signal processing unit 8, 15 is an audio output device that outputs the audio signal supplied from the audio signal processing unit 10, and 16 is supplied from the recording / playback control unit 5 The recorded partial TS is recorded and already recorded The recording / reproducing apparatus supplies the reproduced partial TS to the recording / reproducing control unit 5.

Among the above-described configurations, the digital broadcast receiving apparatus includes constituent units 2 to 13 (portions surrounded by broken lines in FIG. 1).
In the description of the above configuration, the receiving unit 1 indicates a satellite receiving antenna in digital satellite broadcasting such as BS digital broadcasting and CS broadcasting, and is connected to the digital broadcasting receiving device by drawing a transmission cable into a house in cable television broadcasting. It refers to a converter or the like.

  In addition, the control information input from the outside to the input I / F unit 11 described above refers to, for example, the digital broadcast receiving apparatus incorporated in a device including an input operation unit (not shown) and the input I / F unit 11 and the control information. Control information issued by a user operating the input operation unit when the input operation unit is connected, or control issued from a remote control device (not shown) in which the input I / F unit 11 is a remote control reception unit Information, or control information issued from a processor when a processor such as a CPU (not shown) is connected to the input I / F unit 11.

  Further, the recording / reproducing device 16 is, for example, a VTR device such as a D-VHS recorder, a hard disk recorder device, or the like.

  Next, the operation of this digital broadcast receiving apparatus will be described. First, the digital broadcast signal input to the receiving unit 1 is supplied to the first tuner unit 2 and the second tuner unit 3 that operate in conformity with the transmission method of this signal. In this case, for example, when the receiving unit 1 is a satellite receiving antenna that receives a digital satellite broadcast, the digital broadcast signal is converted by the converter unit of the satellite receiving antenna according to the type of broadcast and the transponder of the satellite. Then, it is supplied to the first tuner unit 2 and the second tuner unit 3.

  These two tuner units are operated by the system control unit 12 such that the first tuner unit 2 serves as a user viewing tuner unit and the second tuner unit 3 serves as a recording tuner unit for the recording / reproducing apparatus 16. It is controlled as follows. Specifically, the system is based on viewing channel information and recording channel information necessary for channel selection from control information supplied to the system control unit 12 from the outside via the input I / F unit 11. The control unit 12 controls the first tuner unit 2 to acquire a TS that transmits a viewing channel, and controls the second tuner unit 3 to acquire a TS that transmits a recording-required channel.

Next, operations after the first tuner unit 2 and the second tuner unit 3 will be described separately for a viewing operation mode, a recording operation mode, and a reproduction operation mode.
First, the viewing operation mode will be described below. The first tuner unit 2 performs digital demodulation processing and error correction processing on the incoming digital broadcast signal based on the viewing channel information supplied from the system control unit 12, and then performs this error correction processing. If the received data is scrambled data, descrambling processing is performed to cancel the processing, and a viewing TS is extracted.

  Next, the extracted TS is supplied to the demultiplexing unit 6. The demultiplexing unit 6 is a shared processing unit for processing of the supplied TS (the viewing operation mode) and partial TS processing (the playback operation mode) supplied from the recording / playback control unit 5 described later. It is necessary to select one of the processes. For this reason, the system control unit 12 supplies the TS selection information including information for setting the processing in the viewing operation mode to the demultiplexing unit 6, whereby the demultiplexing unit 6 processes the supplied TS. To be set.

  Next, since the supplied TS is in a state where a plurality of streams are multiplexed, the demultiplexing unit 6 separates the corresponding video stream, audio stream, and data stream based on the viewing channel information. Output. Here, for example, when the data stream is not included in the configuration, the video stream and the audio stream are separated.

In this case, the means for separating the video stream, the audio stream, and the data stream from the supplied TS based on the viewing channel information can be realized by a known demultiplexing technique related to transport decoding. It is possible enough.
Each stream output from the demultiplexing unit 6 by the above means is preferably packet data by PES (Packetized Elementary Stream) or ES (Elementary Stream).

  Next, the video stream (for example, video PES) output from the demultiplexing unit 6 is sent to the video decoding unit 7, the audio stream (for example, audio PES) is sent to the audio decoding unit 9, and the data stream (for example, Data PES or data ES) is supplied to the system controller 12.

  Next, the video decoding unit 7 decodes the supplied video stream and outputs it to the video signal processing unit 8 as video data. The audio decoding unit decodes the supplied audio stream and outputs the decoded audio data to the audio signal processing unit 10. Here, the decoding process of the video stream or the audio stream indicates a decoding process by a known technique such as sequence header detection, video decoding, audio decoding, and synchronous reproduction for these streams. The video stream is based on, for example, the MPEG2 Video system, and the audio stream is based on the MPEG1 system, an AAC (Advanced Audio Coding) system, or the like.

  On the other hand, when the data stream is output from the demultiplexing unit 6, it is supplied to the system control unit 12, where it is decoded by the decoding software, the text or graphics is extracted, and the on-screen display control unit 13 is supplied.

  Next, the on-screen display control unit 13 receives and records the service (the viewing operation mode) received and decoded by the first tuner unit 2 and the second tuner unit 3 described later. When the service (the recording operation mode) is the same service, the caution text for informing the user of the display on the video display device 14 is combined with the supplied text or graphics and output. This will be described later.

As the final stage of the digital broadcast receiving apparatus, the video signal processing unit 8 synthesizes the video data supplied from the video decoding unit 7 and the on-screen data supplied from the on-screen display control unit 13. Then, after being converted into a standardized television signal, it is output to the video display device 14 for video display.
On the other hand, in the audio signal processing unit 10, the audio data supplied from the audio decoding unit 9 is converted into a standardized audio signal, and then output to the audio output device 15 and output as audio.

  Next, the recording operation mode will be described below. The second tuner unit 3 performs digital demodulation processing and error correction processing on the incoming digital broadcast signal based on the recording channel information supplied from the system control unit 12, and then performs this error correction processing. If the data is scrambled data, descrambling processing is performed to cancel the processing, and a recording TS is extracted.

  Next, the extracted TS is supplied to the partial TS generation unit 4. Since the supplied TS is a state in which a plurality of streams are multiplexed, the partial TS generation unit 4 extracts only the corresponding stream based on the recording channel information supplied from the system control unit 12. A partial TS is generated. Subsequently, the extracted partial TS is supplied to the recording / reproducing control unit 5 and output to the recording / reproducing device 16 by the buffering control by the system control unit 12. This buffering control is for adjusting the data rate of the partial TS supplied from the partial TS generator 4 and the input allowable data rate of the recording / reproducing device 16 so as to eliminate excess or deficiency of transmission data.

  Further, the system control unit 12 also controls the recording / reproducing device 16 via the recording / reproducing control unit 5. This control is, for example, control related to operations such as recording start and recording stop of the recording / reproducing apparatus 16. In this case, when the recording / reproducing device 16 is an external recording device such as a D-VHS recorder device or a hard disk recorder device, the system control unit 12 can control the external recording device directly by the recording / reproduction control unit 5. Interfaced.

  Next, the reproduction operation mode will be described below. Control information including reproduction control information input to the input I / F unit 11 from the outside of the digital broadcast receiving apparatus is supplied to the system control unit 12, and the system control unit 12 records and reproduces based on the control information. 5 supplies the reproduction control information. Further, the system control unit 12 sets information for fixing the path for the reproduction operation mode so that the partial TS supplied from the recording / reproduction control unit 5 is processed for the internal processing path of the demultiplexing unit 6. The included TS selection information is supplied to the demultiplexing unit 6. Thereby, the demultiplexing unit 6 is set to the reproduction operation mode.

  Subsequently, the recording / reproducing apparatus 16 is controlled by the reproduction control information supplied to the recording / reproducing control unit 5, and the partial TS recorded in the recording operation mode is reproduced and output from the recording / reproducing apparatus 16. The partial TS reproduced and output from the recording / reproducing device 16 is input to the recording / reproducing control unit 5 and supplied to the demultiplexing unit 6 while being buffered under the control of the system control unit 12.

  The partial TS supplied to the demultiplexing unit 6 is output after being separated into a video stream, an audio stream, and a data stream according to its configuration. Since the subsequent processing is the same as the processing in the viewing operation mode described above, description thereof is omitted.

  Next, a service (the viewing operation mode) received and decoded by the first tuner unit 2 and a service (the recording operation mode) received and recorded by the second tuner unit 3 are provided. Processing when the services are the same will be described below. The comparison between the two services is based on the viewing channel information and the recording channel information that the user inputs from the outside to the system control unit 12 through the input I / F unit 11 in advance. Judgment is made by comparing information. If the two pieces of information are the same by this comparison, the system control unit 12 supplies coincidence flag data indicating the same to the on-screen display control unit 13.

  Next, the on-screen display control unit 13 generates the caution data stored in advance based on the supply of the match flag data. Here, when the text or graphics is supplied from the system control unit 12, the text or graphics and the caution data are combined. Then, only the synthesized data or the caution data is supplied to the video signal processing unit 8, and finally synthesized with the video data for viewing and output.

Here, FIG. 2 shows a screen display example in the video display device 14 when the viewing service and the recording service are the same. In FIG. 2, 101 is a moving image of the selected program, 102 is text / graphics data, and 103 is caution data.
As described above, the caution data 103 is a fixed message generated by the on-screen display control unit 13, for example, text recorded in a data stream separated from the TS extracted by the demultiplexing unit 6. Information may be extracted by the system control unit 12, and the extracted text data may be supplied to the on-screen display control unit 13 and used as the caution data.

  In FIG. 2, both the caution data 103 and the moving image 101 of the selected program are displayed. For example, while the caution data 103 is displayed, the moving image 101 and the text / graphics data 102 are displayed. It may be made invisible by masking with a single background color. As illustrated in FIG. 3, while the on-screen display control unit 13 receives the coincidence flag data, data obtained by synthesizing the caution data 103 and the single color back color 104 is used as a video signal. It is only necessary to supply the processing unit 8 and perform processing for converting only the supplied data into a video signal.

As described above in detail, by using this digital broadcast receiving apparatus, when a user views a broadcast program of an arbitrary channel while arbitrarily changing the channel, the two channels overlap. Since the information that informs it is displayed on the screen of the recording display device 14, the user can obtain a special effect that prevents the user from continuing to watch the program being recorded.
Further, as shown in FIG. 3, while the on-screen display control unit 13 receives the coincidence flag data, data obtained by combining the caution data 103 and the single color back color 104 is used as the video signal processing unit 8. The video is automatically masked even if the user tries to view the program being recorded against the user's intention, thereby obtaining an effect of preventing the video from being viewed. .

As described above, the digital broadcast receiving apparatus according to the present invention can receive an arbitrary channel with each of the two tuner units for the incoming digital broadcast signal, and based on the channel information set by the user, Can be determined.
Therefore, as an industrial applicability of the present invention, for example, if the number of tuner units is further increased and the hardware is expanded as a multi-channel simultaneous receiving device, the number of video display devices equal to or less than the number of tuner units can be connected. Can realize multi-channel simultaneous video display, and when the selected services overlap, it can be applied to the construction of a multi-channel independent simultaneous screening system by performing control such as retuning to another channel.

It is the figure which showed the structural example of the digital broadcast receiver which concerns on this invention. It is the example of a screen display in the video display apparatus 14, when the service for viewing and the service for recording are the same in the digital broadcast receiving apparatus according to the present invention. It is the example of a screen display in the video display apparatus 14, when the service for viewing and the service for recording are the same in the digital broadcast receiving apparatus according to the present invention. (Example of caution data displayed on the back color.)

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Reception part 2 1st tuner part 3 2nd tuner part 4 Partial TS production | generation part 5 Recording / reproducing control part 6 Demultiplexing part 7 Video decoding part 8 Video signal processing part 9 Audio | voice decoding part 10 Audio | voice signal processing part 11 Input I / F unit 12 System control unit 13 On-screen display control unit 14 Video display device 15 Audio output device 16 Recording / reproducing device

Claims (1)

In a digital broadcast receiving apparatus that receives a digital broadcast signal including video information, audio information, and character / graphic information,
An input I / F unit to which viewing channel information and recording channel information are supplied;
Channel selection of the incoming digital broadcast signal, demodulation of the selected digital broadcast signal, and error correction of the demodulated data are performed to convert the transport stream (TS) to the first or second TS. First and second tuner sections to be generated respectively;
The first TS supplied from the first tuner unit separates the video, audio, and data streams corresponding to the viewing program, while the other partial transport stream (partial TS) supplied from the external recording / reproducing apparatus. ) From each of the video, audio, and data streams, and a demultiplexing unit that selects one of the separated streams;
A partial TS generator for generating a partial TS for recording in the recording / reproducing apparatus for the second TS supplied from the second tuner unit;
A video decoding unit and an audio decoding unit that decode video and audio streams supplied from the demultiplexing unit to generate video and audio data;
Decoding means for decoding the data stream supplied from the demultiplexing unit and outputting text or graphics;
A comparison means for comparing the viewing channel information and the recording channel information to output matching flag data if they are the same;
An on-screen display control unit that generates on-screen data by combining the text or graphics and self-owned caution data based on the match flag data;
A video signal processing unit that generates a video signal by combining the generated on-screen data and the video data supplied from the video decoding unit;
An audio signal processing unit that converts audio data supplied from the audio decoding unit into an audio signal;
A digital broadcast receiver characterized by comprising:

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