JP4910691B2 - Digital broadcast receiver - Google Patents

Description

  The present invention relates to a digital broadcast receiving apparatus.

  Currently, digital broadcast receivers such as digital tuners, digital broadcast reception compatible TVs, and digital broadcast reception compatible hard disk recorders sold in the market are sold with a B-CAS card attached. The user can watch the broadcast program by inserting the B-CAS card into the digital broadcast receiving device to cancel the scramble applied to the digital broadcast.

  The B-CAS card is a part of the descrambling system. If the B-CAS card is pulled out of the digital broadcast receiver by the user during the operation of the system, the digital broadcast receiver will hang up. It was. Therefore, the conventional digital broadcast receiving apparatus is provided with a switch in the vicinity of the card insertion slot into which the B-CAS card is inserted as shown in FIG. When the B-CAS card is inserted into the card insertion slot and the switch is positioned at the “lock” position, the B-CAS card cannot be pulled out. If the user intends to pull out the B-CAS card during the operation of the descrambling system, the user first places the switch in the “release” position and then pulls out the B-CAS card. When the switch is positioned towards “cancel”, this is detected and the descrambling system stops operating, so that even if the B-CAS card is subsequently pulled out, no hang-up will occur.

For example, if the technique disclosed in Patent Document 1 is used, when the user slides the cover lock knob to open the card cover, the switch is turned off, and this is detected and the descrambling system stops operating. It is also possible to take. This also prevents a hang-up caused by pulling out the B-CAS card.
Japanese Utility Model Publication No. 4-123460

  However, in the conventional digital broadcast receiving apparatus and the digital broadcast receiving apparatus using Patent Document 1, the operation of moving the switch to “release” or sliding the cover lock knob is performed when the B-CAS card is pulled out. There is a problem that it is necessary and troublesome for the user.

  In view of the above problems, an object of the present invention is to provide a digital broadcast receiving apparatus that does not require a troublesome operation when a card is pulled out and can prevent a hang-up from occurring.

In order to achieve the above object, a digital broadcast receiving apparatus of the present invention includes a card interface having a card insertion slot into which a card is inserted, and a scramble generated by the card inserted into the card interface. A descrambling means for descrambling the transport stream based on the key; at least one rotatable member disposed in front of the card insertion slot; and at least one of the at least one rotatable member. Detecting means for detecting one rotation,
An external force is applied to the at least one rotating member in the card insertion direction while the descrambling means is descrambling the transport stream based on the scramble key generated by the card inserted into the card interface. The at least one rotating member rotates, and the descrambling means stops descrambling when the detecting means detects at least one rotation of the at least one rotating member. It is a feature.

  According to such a configuration, when the user applies an external force to the rotating member with a finger and the rotating member rotates, the card can be gripped with the finger and pulled out from the card interface. Such troublesome operations are unnecessary. Also, since descrambling has already stopped when the user pulls out the card, no hang-up will occur even if the card is pulled out.

In the digital broadcast receiving apparatus of the present invention having the above-described configuration, the at least one rotating member is two rotating members,
When the detecting means detects the rotation of the two rotating members, the descrambling means stops descrambling,
The descrambling means continues descrambling even if the detecting means detects the rotation of one of the two rotating members.

  According to such a configuration, even if the user accidentally applies an external force to one of the two rotating members, the display of the broadcast screen is not interrupted on the display means.

Further, the digital broadcast receiving apparatus of the present invention has the above-described configuration, wherein the detection means includes at least one tact switch,
The detecting means detects that the tact switch is pressed and turned on by at least one of the at least one rotating member by rotating at least one of the at least one rotating member. Then, at least one rotation of the at least one rotation member is detected.

  According to such a configuration, the rotation of the rotation member can be detected with a simple configuration.

  In the digital broadcast receiving apparatus of the present invention, in the above configuration, the descrambling unit stops descrambling, and a display signal output for displaying a display signal for displaying a blue back screen on the display unit is output to the display unit. It is characterized by comprising means.

  According to such a configuration, even if descrambling is stopped, a screen unsightly for the user is not displayed on the display unit.

  In the digital broadcast receiving apparatus according to the present invention, in the above configuration, when a card is connected to the card interface after a lapse of a predetermined time after the descrambling means stops descrambling, the descrambling means It is characterized by restarting scramble.

  According to such a configuration, when the user changes his mind and tries to pull out the card, the broadcast screen can be viewed again.

  According to the digital broadcast receiving apparatus of the present invention, troublesome operations are unnecessary when a card is pulled out, and it is possible to prevent a hang-up from occurring.

  Hereinafter, embodiments according to the present invention will be described with reference to the drawings.

  FIG. 1 shows a block diagram of a digital broadcast receiving apparatus according to the present invention. The digital broadcast receiver according to the present invention includes a receiving unit 2, a descrambling unit 3, a data separating unit 4, a video / audio decoding unit 5, an audio D / A converter 6, a video synthesizing unit 7, and a control unit. 8, a card interface 9, a tact switch 10, and a tact switch 11.

  The antenna 1 is connected to the reception unit 2, receives a broadcast radio wave of digital broadcasting, converts it into a broadcast signal that is an electrical signal, and outputs it to the reception unit 2. The receiving unit 2 extracts a broadcast signal having a frequency indicated by the control unit 8 from the broadcast signal input from the antenna 1, and outputs a transport stream to the descramble unit 3.

  The descrambling unit 3 descrambles the transport stream using a scramble key generated based on a content protection key stored in a B-CAS card (not shown) connected to the card interface 9.

  The data separator 4 separates video data and audio data from the descrambled transport stream, and outputs the video data and audio data to the video / audio decoder 5.

  The video / audio decoding unit 5 decodes the video data and audio data input from the data separation unit 4, outputs the decoded video data to the video synthesis unit 7, and outputs the decoded audio data to the audio D / A converter. 6 is output.

  The video synthesis unit 7 synthesizes the video data input from the video / audio decoding unit 5 and the video data generated by itself, and outputs a display signal based on the synthesis data to a television (not shown). The video composition unit 7 also outputs a display signal based on the video data generated by itself without performing the composition. The audio D / A converter 6 converts the audio data input from the video / audio decoding unit 5 from digital to analog and outputs it to a television (not shown).

  A B-CAS card (not shown) is connected to the card interface 9. The B-CAS card is an IC card provided to a user who has purchased a digital broadcast receiving apparatus, stores a content protection key, and generates a scramble key based on the content protection key.

  The tact switch 10 and the tact switch 11 are switches for detecting that the B-CAS card is about to be pulled out from the card interface 9, and the operation will be described later.

  FIG. 2 is a schematic perspective view showing the structure in the vicinity of the card insertion slot of the digital broadcast receiving apparatus according to the present invention. FIG. 3 is a schematic side sectional view of the structure in the vicinity of the card insertion slot.

  A substantially rectangular parallelepiped recess 12a is formed on the front surface of the housing 12 of the digital broadcast receiver according to the present invention. The shutter member 13 has a substantially triangular prism shape, and is provided with a through-hole 13a penetrating in the longitudinal direction from the vicinity of the apex of the one end face having a substantially triangular shape to the vicinity of the apex of the other end face having a substantially triangular shape. Then, a shaft (not shown) is passed through each hole (not shown) formed on the front upper side of the left and right side portions of the recess 12a and the through hole 13a of the shutter member 13. The shutter member 13 is supported by an elastic member (not shown) so as to be rotatable around the axis.

  The shutter member 14 also has a substantially triangular prism shape, and is provided with a through-hole 14a penetrating in the longitudinal direction from the vicinity of the apex of the substantially triangular one end surface to the vicinity of the apex of the other triangular end surface. Then, a shaft (not shown) is passed through each hole (not shown) formed on the front lower side of the left and right side surfaces of the recess 12a and the through hole 14a of the shutter member 14. The shutter member 14 is supported by an elastic member (not shown) so as to be rotatable around the axis.

  A card insertion slot 12b is formed in the bottom surface of the recess 12a, the card insertion slot of the card interface 9 is located behind the card insertion slot 12b, and the B-CAS card is inserted into the card insertion slot 12b and the card interface. 9 can be inserted into the card interface 9 through the card insertion slot 9.

  When no external force is applied to the shutter member 13 and the shutter member 14, the shutter member 13 and the shutter member 14 are supported by elastic members (not shown) at the positions shown in FIG. 10 is in contact with one side of the shutter member 13 in the off state, and the tact switch 11 is in contact with one side of the shutter member 14 in the off state.

  Here, when the user applies an external force to the shutter member 13 and the shutter member 14 with the finger in the card insertion direction, the shutter member 13 and the shutter member 14 rotate away from each other as shown in FIG. Is turned on by being pushed by the shutter member 13, and the tact switch 11 is turned on by being pushed by the shutter member 14, so that the gap between the shutter member 13 and the shutter member 14 is widened. In this state, the user inserts the B-CAS card into the card interface 9 through the gap between the shutter member 13 and the shutter member 14, the card insertion slot 12 b and the card insertion slot of the card interface 9.

  When the user removes the external force by removing the finger from the shutter member 13 and the shutter member 14 after the card is inserted, the shutter member 13 and the shutter member 14 are rotated by the respective elastic members (not shown), as shown in FIG. Returning to the same position as 3 (a), the tact switch 10 and the tact switch 11 are turned off again.

  Here, with the B-CAS card inserted into the card interface 9 as shown in FIG. 3C, the control unit 8 reads the scramble key generated by the B-CAS card and sends it to the descrambling unit 3. Assume that the descrambling unit 3 descrambles the transport stream input from the receiving unit 2 using a scramble key, and a broadcast screen is displayed on a television (not shown).

  Here, when the user applies an external force in the card insertion direction to the shutter member 13 and the shutter member 14 with a finger, the shutter member 13 and the shutter member 14 rotate away from each other as shown in FIG. 10 is pushed by the shutter member 13 and turned on, and the tact switch 11 is pushed by the shutter member 14 and turned on, and the control unit 8 detects that the tact switch 10 and the tact switch 11 are turned on (FIG. 4). Step S1).

  Then, the control unit 8 stops reading the scramble key and sending it to the descrambling unit 3, and the descrambling unit 3 stops descrambling. At this time, the video composition unit 7 generates a video signal according to an instruction from the control unit 8, outputs a display signal to a television (not shown), and a blue back screen is displayed on the television (step S2).

  Then, after a predetermined time, the control unit 8 confirms whether or not the B-CAS card is connected to the card interface 9, and the gap between the shutter member 13 and the shutter member 14 is already within the predetermined time as shown in FIG. When the user grips the B-CAS card protruding from the card with the finger applied with external force to the shutter member 13 and the shutter member 14 and pulls it out from the card interface 9, and the B-CAS card is not connected to the card interface 9. (N in Step S3), the blue back screen is continuously displayed on the television (not shown) by the display signal output from the video composition unit 7.

  On the other hand, as described above, the control unit 8 confirms whether or not the B-CAS card is connected to the card interface 9, and the B-CAS card is not pulled out from the card interface 9 within the predetermined time. Is connected to the B-CAS card (Y in step S3), the control unit 8 resumes reading the scramble key and sending it to the descrambling unit 3, and the descrambling unit 3 resumes descrambling ( Step S4), the broadcast screen is displayed again on the television (not shown).

  As described above, in the present invention, the user applies an external force to the shutter member 13 and the shutter member 14 with the finger in the card insertion direction to rotate the shutter member 13 and the shutter member 14 and holds the B-CAS card with the same finger as it is. Since the card can be pulled out, the conventional troublesome operation is not required when the card is pulled out. Further, when the user applies an external force to the shutter member 13 and the shutter member 14 in the card insertion direction with a finger, the tact switch 10 and the tact switch 11 are turned on, and the descrambling process is stopped. Even if the interface 9 is pulled out, no hang-up occurs.

  3C, an external force is applied to only one of the shutter member 13 and the shutter member 14, and only one of the shutter member 13 and the shutter member 14 is rotated. When only one of the tact switch 11 is turned on and the control unit 8 detects this, the control unit 8 continues to read the scramble key and send it to the descrambling unit 3, and the descrambling unit 3 Continue scrambling. As a result, even when the user accidentally touches either the shutter member 13 or the shutter member 14, the display of the broadcast program on a television (not shown) is not interrupted.

  Only one of the tact switch 10 and the tact switch 11 may be provided, and the descrambling may be stopped when the control unit 8 detects that the provided tact switch is turned on.

These are the block diagrams of the digital broadcast receiver which concerns on this invention. These are the schematic perspective views which show the structure of the card insertion slot vicinity which concerns on this invention. These are schematic side sectional drawings of the structure of the card insertion slot vicinity which concerns on this invention. These are flowcharts regarding the operation | movement at the time of card | curd extraction based on this invention. These are figures which show the external appearance of the conventional card insertion slot vicinity.

Explanation of symbols

9 Card Interface 10 Tact Switch 11 Tact Switch 12 Case 12a Recess 12b Card Insertion Port 13 Shutter Member 13a Through Hole 14 Shutter Member 14a Through Hole

Claims (5)

A card interface having a card insertion slot into which a card is inserted, and a descrambling means for descrambling a transport stream based on a scramble key generated by the card inserted into the card interface Display signal output means for outputting a display signal based on the transport stream descrambled by the descrambling means to the display means, and a first rotatable and disposed in front of the card insertion slot. A rotation member, a second rotation member, and a detection means that includes two tact switches and detects the rotation of the first rotation member and the second rotation member,
The first rotating member and the second rotating member in a state where the descrambling means is descrambling the transport stream based on a scramble key generated by a card inserted into the card interface. When an external force is applied to the card insertion direction, the first rotating member and the second rotating member are rotated so as to be separated from each other, and the tact switch is switched between the first rotating member and the second rotating member. When the rotation of the first rotation member and the second rotation member is detected by the detection means, and the descrambling means stops the descrambling, the detection means detects the rotation. The display signal output means outputs a display signal for displaying a blue back screen on the display means to the display means, and the descramble means If the descrambling Stop after a predetermined time has elapsed card into the card interface are connected, said descrambling means resumes the descrambling,
The descrambling means continues descrambling even if the detection means detects any one of the first turning member and the second turning member.
A digital broadcast receiver characterized by that. A card interface having a card insertion slot into which a card is inserted, and a descrambling means for descrambling a transport stream based on a scramble key generated by the card inserted into the card interface And at least one rotatable member disposed in front of the card insertion slot and rotatable, and detecting means for detecting rotation of at least one of the at least one rotatable member,
An external force is applied to the at least one rotating member in the card insertion direction while the descrambling means is descrambling the transport stream based on the scramble key generated by the card inserted into the card interface. And when the at least one rotation member rotates and the detection means detects at least one rotation of the at least one rotation member, the descrambling means stops descrambling ,
The at least one rotating member is two rotating members;
When the detecting means detects the rotation of the two rotating members, the descrambling means stops descrambling,
The digital broadcast receiving apparatus according to claim 1, wherein the descrambling means continues descrambling even if the detecting means detects rotation of one of the two rotating members . The detection means comprises two tact switches,
The detection means detects the rotation of the two rotation members by detecting that the tact switch is pressed by the two rotation members and turned on by the rotation of the two rotation members. to, a digital broadcast receiving apparatus according to claim 2, characterized in that. 3. The display device according to claim 2, further comprising a display signal output unit configured to stop the descrambling and to output a display signal for displaying a blue back screen on the display unit to the display unit. Digital broadcast receiver. 3. The descrambling means resumes descrambling when a card is connected to the card interface after a predetermined time has elapsed since the descrambling means stopped descrambling. The digital broadcast receiver as described.

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