JP4128273B2 - Receiving machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a receiver that can perform a process of registering receivable channels corresponding to a predetermined key in a short time.
[0002]
[Prior art]
In a television receiver, a channel with good reception is registered in advance in correspondence with a predetermined preset key, and a desired channel can be received simply by operating the preset key at the time of reception. However, in an in-vehicle television receiver, the channels that can be received differ depending on the traveling region, so even if a channel that can be received in one region is preset, it may not be received in another region. Therefore, it is necessary to frequently execute channel preset operations. In order to perform this troublesome operation automatically, an auto-preset function is provided. When the auto-preset key is operated, the TV reception is stopped and the reception channel is automatically swept from channel 1 to channel 62 for each channel. To detect the reception level. Then, as many preset keys as the number of preset keys (for example, 6) are registered in order from the channel with the highest reception level.
[0003]
[Problems to be solved by the invention]
In conventional in-car TV receivers, when execution of auto-preset is instructed, the tuner reception channels are sequentially changed to detect and determine the level, and the channels with higher reception levels correspond to the preset key numbers. Therefore, during auto preset, the tuner is used for sweeping the reception channel, and there is a problem that the television broadcast cannot be viewed. In particular, in such a television broadcast wave, it takes about 20 seconds from 1ch to 62ch, and the auto preset time becomes long.
[0004]
An object of the present invention is to provide a receiver that shortens the time during which viewing is hindered due to auto-preset.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a television receiver for receiving a television broadcast wave of a channel stored corresponding to a predetermined key by operating a predetermined key.
A registration means for registering a plurality of channel groups composed of a plurality of channels;
Setting means for setting a desired reception channel in the registration means;
Designating means for designating a channel group to be swept from among a plurality of channel groups stored in the registration means;
Sweeping means for sweeping only the channels of the channel group designated by the designation means;
Storage means for storing a channel whose reception level is higher than a predetermined reference level in association with a predetermined key by sweeping the channel by the sweeping means is provided.
[0006]
A setting unit for setting and operating a channel of a channel group registered in the registration unit is provided.
[0007]
【Example】
FIG. 1 is a block diagram showing a configuration of a television receiver according to an embodiment of the present invention, where (a) is an overall view and (b) is a configuration diagram of an operation unit 4. Hereinafter, it demonstrates according to a figure.
Reference numeral 1 denotes a television receiver, which is a tuner 11 that receives television broadcast waves, a detector circuit 12, a PLL circuit 13 that sets a frequency, and an audio output unit that separates and amplifies the received audio signal into left and right stereo signals and outputs them to speakers. 14 includes a display unit 15 that generates R, G, and B signals from the received video signal and displays them on a liquid crystal or the like, and a level detection unit 16 that detects the detected reception level. Reference numeral 3 denotes a control unit for instructing the PLL circuit 13 of reception frequency corresponding to registration of a reception channel and a preset key.
[0008]
Reference numeral 4 denotes an operation unit including a push button switch (key) for performing a preset registration operation, and an auto preset key 41 for instructing to automatically execute a preset, and correspondingly stored by pressing a predetermined key. A preset key 42 (key numbers 1 to 6) for receiving a channel, area designation keys 43a to 43c for designating a channel area to be swept, and the like. It should be noted that the key explanation of the operation unit 4 shows only those related to the auto preset process.
[0009]
FIG. 2 is a flowchart of processing performed by the control unit of the television receiver according to the embodiment of the present invention. Hereinafter, it demonstrates according to a figure. In this example, the channel area to be swept in advance is divided into 3 groups of 1 to 12 ch (A area), 13 to 40 ch (B area), 41 to 62 ch (C area), and auto preset is instructed. At this point, only the channel region corresponding to any group is swept (hereinafter, a case where 41 to 62ch is designated will be described as an example). In TV broadcasting, the approximate receiving channels are concentrated in specific areas. For example, VHF (1ch-12ch) in large cities such as Tokyo and Osaka, UHF low frequency, UHF high frequency in local cities, etc. This is because it is often necessary to sweep the entire channel region. Further, this processing starts from the point in time when the auto preset key 41 and the area designation key 43c (in this example) are operated.
[0010]
In step S11, it is determined which channel region has been designated, and the process proceeds to step S12. That is, the determination is made based on the state of the auto preset key 41 and the area designation keys 43a to 43c operated by the user. For example, it is assumed that the operation key 43c (41ch to 62ch) corresponding to the C area is operated.
In step S12, the reception channel is set to the first (lower limit) channel in the channel area corresponding to the operated key, and the process proceeds to step S13. That is, it is set to 41ch.
[0011]
In step S13, the reception level is detected, and the process proceeds to step S14. That is, the output signal of the detector 12 is measured by the level detector 16.
In step S14, it is determined whether or not the reception level is higher than the reference level. If the reception level is higher than the reference level, the process proceeds to step S15. If the reception level is lower than the reference level, the process proceeds to step S17. That is, it is determined whether or not the reception level can be received satisfactorily.
[0012]
In step S15, the preset key is stored, the reception channel is updated, and the process proceeds to step S16. In other words, the channel of the broadcasting station that can be satisfactorily received is stored in the memory in the control unit 3 corresponding to the key number of the preset key 42. Then, the next channel is set.
In step S16, it is determined whether or not it is the last channel in the channel region corresponding to the operated key. If it is the last channel, the process proceeds to step S18, and if it is not the last channel, the process proceeds to step S17. That is, it is determined whether detection of the reception level is completed up to 62ch of the last channel in the designated area.
[0013]
In step S17, the next channel is set and the process returns to step S13. In other words, since the determination as to whether or not good reception is possible for one channel has been completed, the next channel (up one channel) is set. And the same processing (step S13-step S17) is repeated.
When the number of receivable channels exceeds the number of preset keys (six in this example) during channel sweeping, channels with low reception levels are excluded from presets, and new channels with high reception levels are registered. .
[0014]
In this example, the area designation keys 43a to 43c are newly provided to designate the channel area. However, the existing preset key 42 may be also used. For example, the area designation key 43 a is substituted with the first key of the preset key 42. Furthermore, the time for auto-preset can be further shortened by increasing the area designation.
[0015]
As described above, in this embodiment, the preset is performed during the reception of the television broadcast, but only the limited channel region assumed for each region is swept in advance, so that the time required for the auto preset can be shortened.
FIG. 3 is a diagram for explaining auto-preset processing of a television receiver according to another embodiment of the present invention. (A) is a sweep area, (b) is a sweep area designation screen, and (c) is when a sweep area is designated. (D) is a key operation at the time of auto-preset, and (e) is a diagram showing a key operation at the time of reception. Hereinafter, it demonstrates according to a figure. In this example, the sweep area of the reception channel is set with only the pre-designated channels as a group (group) for each region, and the channels belonging to the designated group are specified by specifying the group at the start of auto-preset. Only sweeps.
[0016]
As shown in FIG. 3A, the case where the A area is 1 to 12 ch, the B area is 1 to 12 ch and 19 ch, the C area is 49 to 61 ch, and the D area is 1 to 12 ch and 49 to 61 ch is described. . In addition, the area is specified by a corresponding key number (also used as a preset key).
First, when the sweep area is designated (see FIG. 3C), the auto preset key 41 is continuously pressed, then one channel is received and the second key of the preset key 42 is pressed. Is received, the second key of the preset key 42 is pressed, and the auto preset key 41 is kept pressed to indicate completion. At this time, on the TV screen, as shown in FIG. 3B, the channel registered as the B area (in the second key) is displayed.
[0017]
Instructing execution of auto-preset is the same as the previous embodiment except that it is determined which channel region is designated and corresponding processing is performed, so that the description is omitted (see FIG. 3D). ). For example, by pressing the second key of the preset key 42 after the auto preset key 41, the channels 1 to 12 and 19ch corresponding to the B area are subjected to the channel sweep.
[0018]
When receiving a preset, the corresponding channel can be received by operating (pressing) the key number of the preset key 42 registered by the auto-preset process (see FIG. 3E).
As described above, according to the present embodiment, when the reception area is moved relatively frequently, the area corresponding to the moved area is designated by the key number, so that the auto preset can be performed in a short time. In addition, sweep channels can be specified finely for each region, channels that are not swept are eliminated, and time is shortened.
[0019]
【The invention's effect】
As described above, according to the present invention, it is possible to provide a receiver that shortens the time during which viewing is hindered due to auto-preset.
[Brief description of the drawings]
FIG. 1 is a block diagram illustrating a configuration of a television receiver according to an embodiment of the present invention.
FIG. 2 is a flowchart of processing performed by a control unit of a television receiver according to an embodiment of the present invention.
FIG. 3 is a diagram for explaining auto-preset processing of a television receiver according to another embodiment of the present invention.
[Explanation of symbols]
11 .... tuner, 18 .... level detector,
12 ... Detection circuit 3 ... Control part
13... PLL circuit, 4.
14 .... Audio output part, 41 ... Auto-preset key,
15 ... Display, 42 ... Preset key,
16 .... Memory,
43a, 43b, 43c,... Area designation key.

Claims (1)

In a television receiver for receiving a television broadcast wave of a channel stored corresponding to the predetermined key by operating a predetermined key,
A registration means in which a plurality of channel groups consisting of a plurality of receiving channels are registered;
A setting unit for performing an operation of setting a reception channel of a channel group registered in the registration unit ;
Designating means for designating a channel group to be swept from among a plurality of channel groups stored in the registration means;
Sweeping means for sweeping only the channels of the channel group designated by the designation means;
A television receiver comprising: storage means for storing a channel whose reception level is higher than a predetermined reference level in association with a predetermined key by sweeping the channel by the sweep means.

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