TWI264882B - Digital broadcast receiver capable of switching radio frequency output modes - Google Patents

Abstract

This invention provides a digital broadcast receiver capable of switching the radio frequency output modes. The digital broadcast receiver includes a receiving module, a microprocessor, an encoder, and a frequency modulation transmitting module. The receiving module has an antenna for receiving the radio frequency of a digital broadcast, down-converting the radio frequency to transform the radio frequency into digital signals, and demodulating the digital signals for output. The microprocessor is coupled to the receiving module for decompressing and restoring the digital signals output by the receiving module such that the audio signals and data can be separated and output. The encoder is coupled to the microprocessor for encoding the audio signals and data output by the microprocessor and then outputting the encoded audio signals and data. The frequency modulation transmitting module has an antenna and is coupled to the encoder and the microprocessor, respectively. The frequency modulation transmitting module processes the encoded signal output by the encoder to generate a frequency modulation carrier, and transmits the carrier through the antenna via a specific frequency band such that a radio frequency receiving and playing device, such as a radio or a car stereo equipment, can receive the carrier in an effective range for playing.

Description

1264882 V. INSTRUCTION DESCRIPTION (1) (I) Technical Field of the Invention The present invention relates to a digital broadcast receiver for converting a radio wave mode output, in particular, a digital broadcast signal is received and converted into After the FM carrier is transmitted, it can be received and played by a general broadcast receiving and playing device such as an external radio or car audio: 4 receivers. (1) [Previous Technology] With the rapid development of information technology, the information that the public can obtain has also evolved from past oral communication, text media, radio, and television to the current transmission through the Internet. The limitation is to pass the immediate sound and image to the other side of the globe. For the past, the way to broadcast audio signals through broadcasting is mainly the media tools that the public relies on to obtain the latest information from the outside world. However, with the rise of television and movie media, they can also pass through screens and loudspeakers. The images and sounds that are played can create a greater impact on the visual mass of the public, thus making the media a secondary medium, and the number of people using the broadcast is thus reduced and lost. However, due to the analogy of broadcast technology (such as FM frame and AM frequency modulation), the sound quality is low, susceptible to interference, fast moving = unfavorable quality of reception, and the transmission quality will affect the broadcast quality, 】 and j The carrier can't cooperate with the shortcomings of the radio station to provide information services, so that the department encountered an intractable bottleneck in Lu Yun, but until today, due to the advancement of digital technology, 'Digital Audio ^adcasting (DAB) has been available. Solved the above shortcomings, digital audio

1264882 The frequency band set in 1892: 1 452-1 can provide high-quality anti-jamming and the power of the plane of the South, like the CD record and static, and the impact of the aircraft power is also small, and can be attached to own For users of analog audio receiving products, the broadcast receiver device can be used in the cost of digital broadcasting, and the 492 MHz quality and double sound are played, and the error correction has FM transmission. Its cover tape transmits the attached broadcast quality, but if it is necessary, it must be received and broadcast generally to the fifth, the invention description (2) broadcast mainly by the WARC meeting

Segment: 170-240 MHz or L broadcast its main advantage is the sound broadcasting, its sound quality can be excellent in multi-path, shadow, shift, but also very high power efficiency, and it is sent to one percent, for the ring 9 5 % 'time validity 9 g % Although the digital audio playback quality and the excellent broadcast receiving and playing information, in addition to the purchase of the original broadcast receiving and broadcasting content, it will be inconvenient to use. And make and use. Including VHF frequency, digital audio channel, multi-channel vertical quality, and its ability to receive quality, there is a very one-tenth of the i rate can be added to the information. There is a better audio in the current use of a listening digital broadcast to replace or upgrade its digital broadcasting burden, and cause the public to promote 丨C3) [Summary] The main purpose of the present invention, in the digital output of the output The receiver transmits the digital broadcast signal received by the receiver to the outside world to borrow and receive the player through the FM band. The stomach provides a convertible radio wave mode, which is mainly enabled by the digital broadcast receiver to be processed, and then broadcasted by the external broadcast receiving device through the frequency modulation.

1264882 V. Description of invention

Another object of the present invention is to provide a digital broadcast receiver in the form of a digital broadcast receiver. The user of the device can transmit through the digits and transmit through the existing broadcaster without the need for additional hardware devices. Providing a convertible radio wave mode such that only a general broadcast receiving broadcast is exchanged and upgraded. The broadcast receiving and playing device broadcast receiver transmits and broadcasts the digital broadcast signal to the receiving and playing device to achieve the above-mentioned purpose. The digital broadcast of the present invention f receiving module, - microprocessor, an encoder and = there is: the receiving module is connected with an antenna for receiving the digital wide two gold to reduce the frequency of the RF signal [converted to digital signal = digital signal After the mediation, the microprocessor is connected to the receiving module to decompress the digital signals outputted by the ^f & k group and force the audio signals and data to be separated. And the data is encoded and then output *; : 2: The skin is transmitted through the antenna' # can be received by a radio or car with a sound 2:: The device receives the carrier signal within the effective transmission range and: Player. % The invention further comprises a control module and a play module, and the complex J: module is connected to the microprocessor, and can be controlled for the digital broadcast receiver: : characteristic setting, receiving program and service function selection day Shouneng can control and select the signal system after the microprocessor has processed it.

1264882 V. Invention Description (4) --- To the player module or the FM transmitter module for processing, # is connected to the microprocessor for playing digital broadcast information, f group signal and text graphics Information person. The playback module of the present invention further includes a digital/analyzer and a display unit, the display unit being connected to the microprocessor, the main unit, the display operation or the playback of the graphic or text information 'or program The information for the digital/analog converter is connected to the microprocessor, and the sound signal is outputted by the microprocessor, and the digital signal is converted into an analog audio signal and then transmitted through the speaker. Player 1 曰汛 The present invention further includes a channel selection module, which is connected between the group and the microprocessor, and can be searched for "=, and searched within the channel range. Detecting the frequency of no use, and selecting it as the frequency of the FM band emitted by the FM transmitter module. (IV) [Embodiment] In order to enable the reviewing committee to further understand the structure, features and purposes of the present invention, DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention is as follows: • Referring to FIG. 1, a preferred embodiment of the digital broadcast receiver 20 of the present invention and a digital broadcast transmission A system architecture diagram consisting of a broadcast receiving and playback device 30. As shown, the system transmits a digital broadcast signal by a digital broadcast transmitting station 1 and receives a digital broadcast by a digital broadcast receiver 20. After the signal is transmitted and demodulated, the signal is converted into an FM carrier, and the signal is transmitted to the radio in a specific frequency band.

Page 8 1264882

The wave mode is transmitted, so that the existing radio or car audio can be used in the 'demodulation and playback of this signal. See the figure shown in Figure 2 in May, which is the circuit block diagram of the example. As shown in the figure, there is a receiving module 2 1 , a 2 3 , an FM transmitting module 2 4 receiving module 2 1 has an antenna 2 station 10 transmitted digital broadcast radio frequency to intermediate frequency (IF) signal, and then converted After the mediation, the output is connected to the microprocessor 2 2, and the receiving module 2 1 is connected, the connection is decompressed, restored, separated, and output to the encoder 2 2 to connect the microprocessor data. The output to the frequency modulation 24 has an antenna 241 and is connected by 2 2, which is an encoder 2 3 _ FM carrier, and selects a specific 2 4 1 transmission, which can be set by a retractable I 3 3 有效 in an effective transmission range The broadcast receiving and playing device 3 receives the audio signal in one or the same time or the receiving device in the receiving range of the receiving and receiving device. The digital broadcast receiver 20 is preferably not, the digital broadcast receiver 2, the main microprocessor 2 2, an encoder and a channel selection module 2 7, wherein 1 1 is for receiving a digital broadcast transmission signal 'and The RF signal is down-converted into a digital apostrophe' and the digital signal is processed; the digital signal transmitted by the microprocessor 2 2 and the receiving module 2 1 enables the audio signal and data data to be processed; the encoder 2 3 And the audio signal and the data transmission module 24 input by the microprocessor 2; the FM transmitter module and the encoder 23 and the signal outputted by the microprocessor respectively generate a frequency modulation band to transmit the carrier via the antenna sound machine or The car audio system and the like receive the carrier signal within the broadcast receiving broadcast, and select the data data according to the playing function of the body. Between the channel selection module and the microprocessor 2, it is used for 1264882. 5. Description of the invention (6) Set a searchable frequency to detect the unused frequency and the frequency of the FM band. Please also refer to the flow chart of the path search method to set the channel range to the blank frequency, 2 2, so that the microprocessor 2 / and 2 4 when transmitting the carrier, the system sets the rate first, and Set the search frequency in the FM band (87. 5MHz measured range; in the step S small value starts to search for the frequency range set by the channel range 4 0 3, the system will judge the frequency of any frequency detected beforehand If there is a channel signal of the channel, it means the frequency used. At this time, it can be 2 2, so that the microprocessor 2 group 2 4 transmits the carrier when the display (not shown), the channel range, and The channel range is searched and selected as the FM transmitter module. The internal channel 3 is shown in Figure 3, which is the frequency of the channel selection module 27. The channel selection module 27 is mainly capable of performing blank frequencies. Detecting, detecting and outputting the frequency to the microprocessor 2 can use the frequency as the frequency of the specified FM mode radio wave; first, in step s, the channel range to be searched, and the starting frequency interval size, In the present invention, it is set within the range of ~108 MHz), as the blank frequency detection 4 0 2, the frequency signal in the most recent starting frequency is preset, and the starting frequency can also be searched by the maximum value; s Is there any channel signal detected? If the signal is executed, step S 4 〇 4, and continue to detect the next one according to the size of the increase and decrease. On the other hand, when the detection result does not find any detected frequency as a blank frequency, that is, if the number of frequencies to be searched is not known, the value of the drought is reported to the microprocessor 2, and then the遂 From the ^ ^ frequency sheep as the FM transmission of the analog frequency and the specified frequency is recognized + 梃 for the user to adjust the broadcast reception and playback

Page 10 1264882 V. Description of the invention (7) The listening frequency of the clothing 30 is at the same location, and the step 5 ί" ' is convenient for receiving the broadcast. ^ 4〇5 , , , ° Search for the beam frequency and Detection.) Bay: = Encoder 2 3 is an RDS (Radk Data Γ 1 "23 5RDS^^^^^^(Rad1〇Data

System, RDS) system, because ρης is in inflammation 4, Μ m , , . „ : Because RDS is a type of ^ = ' attached to FM radio, Qiu ^ Ya can use the frequency broadcast by general FM radio stations, and then force : The code of the upper B is used to transmit information to a specific material, for example, the frequency can be adjusted to the most; :; 4; when the receiving quality is improved, 'self• ^ AA ^ ^ ^, the hair port ^ 5 tiger, so by the present invention After demodulating the content of the connected ί: Ϊ, and encoding it through the RDS encoder, and encoding it into the FM carrier, the user can Ϊ: ; RDS function broadcast receiving and playback device 3 〇 When receiving the signal, 媸二Γ receives the attached audio signal and text information content, and performs the ϊϊ ; and then 'because the sound or the singer with the s-S function starts When the signal is received, it can be automatically adjusted to the strongest receiving frequency to maintain the optimal receiving condition. Furthermore, the microprocessor 22 described in this embodiment is a digital device for the lack of DlgltalSl. , DS... make ^ 2 2 in addition to general arithmetic processing In addition to the function, the X-ray signal can be decompressed and restored at the same time, and the digital signal processing cry 2 2 can be either a hardware form or a software form in the present invention. Shown as the digital broadcast receiver 2 of the present invention

In page 11 1268882 V. Description of the invention (8) The circuit bit broadcast receiver 2 of the second embodiment is mainly: and = not, in the present embodiment, the 'number receiving module 2!, the micro place; The function, in addition to including the Μ, play module module 25 and - play module signal and text graphics information, straight: including: number: broadcast information content audio 2 6 1 and - display unit? η: digital/analog converter but can play # & 2 fi μ # *j 仔 digit broadcast receiver 2 〇 not want to play chess 2 6 play digital broadcast ton ton frequency transmit wedge group 2 4 will be encoded The number of digits is broadcasted by the 17th fine, the carrier type is transmitted by the 5 spirits and the Gansu broadcasts the barren content to adjust the frequency: ff ^ to the outside world, wherein the receiving module 2 1 and one day green 2 1 1 is used to receive the digits After the radio frequency signal of the broadcast, = to the intermediate frequency "F) signal, the conversion is restored to the digital signal; the frequency::: the bit signal is adjusted and outputted to the microprocessor 2 2 to connect the 22 system to the receiving module 21, The digital signal of the receiving module 2; Uj is decompressed and restored, so that the audio signal ==: the body material is separated and outputted; the control module 25 is connected with the "micro-location! Theft 2 2, which can be used for digital The receiving function of the broadcast receiver 2 is controlled by the selection of the receiving program and the service function, and at the same time, the signal after the processing by the processor 2 is controlled to be selectively output to the playing fine 26 or the FM transmitting. One of the modules 24 is processed; the display is dry 2 2 2 is connected to the micro The processor 2 2 'mainly provides a graphic or text information of the display operation or the information content of the program; the digital/analog converter 2 6 1 is connected to the microprocessor and is connected to a speaker 2 6 3 ' Receiving the audio signal outputted by the micro-processing to 2 2, converting the digital signal of the digital type on the 12th page 1264882, and the audio signal of the invention description (9) into a class player; the encoder 2 3 is the audio input of the 2 2 The frequency transmitting module 2 4; the frequency modulation band determined by the frequency modulation and the signals output by the encoders 2 3 and 23 respectively receives the carrier signal through the broadcast of the carrier or the car audio, and has the carrier signal The function is to play the function and the data data. The embodiment is connected to the frequency of the channel module that can be searched by the receiving module 2 1 to select the frequency of the frequency band, and the received digital machine 2 itself by the above demand. The broadcast has the FM transmitter module 24 to go to >, and the external broadcast is connected to the above description. It can be seen that the broadcast receiver 20, after the number of information, can be used to adjust the outside world through the built-in digital broadcast information. Broadcast reception After the output is higher than the audio signal, the speaker and the microprocessor 2 2 i are pulled. The connection 'is the micro-processing t, the data data is encoded and output to the modulation module 2 4 - the antenna 2 4 1 , the micro-processing The device 2 2 is connected, and the encoder is processed to generate an FM carrier, and a special transmission is selected by the antenna 2 4 1 , and the receiving and receiving device 3 can be used in an effective transmission mode and the receiving device 3 is received according to the broadcast. It is selected to play one or both of the audio signals or another channel selection module 2 7 and the microprocessor 2 2 for setting the range and searching and detecting within the channel range as The implementation of the above-described embodiment of the transmission in the FM transmitting module 24 can be performed by the user via the digital broadcast receiving and discharging module 26 according to the broadcast signal selection, or can be transmitted by the FM carrier via the digital broadcast signal. The receiving device 30 performs reception and playback. The present invention mainly discloses a frequency-modulation transmitting module 2 for receiving a digital broadcast by a digital wide-band broadcast receiver 20, which transmits the processed frequency carrier so as to be able to receive and play through the setting of 30, in other words,

1264882 V. Description of the Invention (10) The digital broadcast received by the broadcast receiving and broadcasting device of the existing FM radio broadcast device can be received by the original frequency channel, but the above description is not limited to the above-mentioned The shape and decoration should be included in the broadcast service, 3 〇, the broadcaster has a wide range of information, and only the implementation structure, the present invention and the use can be transmitted without any need to convert the broadcast data. For the scope, features, and application of the present invention, if it is desired to replace or upgrade the original digital broadcast receiver 2 into a frequency modulated carrier, the device 30 is transmitted through a preferred embodiment. The application for the invention is within the scope of equal change. In addition, the wide-ranging 0 will be re-launched, and the patent and repair

Page 14 1264882 Brief Description of the Drawings (5) [Simple Description of the Drawings] Fig. 1 is a system architecture diagram of a preferred embodiment of the digital broadcasting receiver of the present invention, together with a digital broadcasting transmitting station and a broadcast receiving and playing device. Figure 2 is a circuit block diagram of a preferred embodiment of a coefficient bit broadcast receiver. Figure 3 is a flow chart of a channel search method for a channel selection module of one of the preferred embodiments of the coefficient broadcast receiver. Fig. 4 is a circuit block diagram showing a second embodiment of the digital broadcast receiver of the present invention. [Main component symbol description] 1 0 Digital broadcast transmitting station 2 0 Digital broadcast receiver 2 1 Receiver module 2 1 1 Antenna 2 2 Microprocessor 2 3 Encoder 2 4 FM transmitter module 2 4 1 Antenna 2 5 Control mode Group 2 6 Playback module 2 6 1 Digital/analog converter 2 6 2 Display unit 2 6 3 Speaker 2 7 Channel selection module

Page 15 1264882 Simple illustration of the diagram 3 0 Broadcast receiving and playback device

Page 16

Claims (1)

1264882 VI. Shen 3 4 Please patent scope ': ϊ: turn; radio wave mode round digital broadcast receiver, use the receiver package = broadcast receiving playback device to play content, the digital broadcast module 'has an antenna 1 After receiving the radio frequency of the digital broadcast, the RF signal is down-converted, converted and converted into a digit 2~, and the digital signal is adjusted and outputted; a ϊ ί Γ1 is connected to the receiving module to output the receiving module The digital signal is decompressed and restored, so that the audio signal and the data data are separated and outputted; and/or an encoder is connected to the microprocessor, and the audio signal output by the microprocessor is And the data data is encoded and then transmitted, and an FM transmitter module has an antenna and is connected to the encoder. The signal is converted and processed by the encoder to generate a frequency modulated carrier, and a specific frequency band is used. The carrier is transmitted through the antenna, and the broadcast receiving device receives the carrier signal and performs the player within a valid range of the transmission. & A digital broadcast receiver of the convertible radio wave mode output according to claim 1, wherein the encoder is an FM subcarrier (R D S) encoder. The digital broadcast receiver of the convertible radio wave mode output according to claim 1, wherein the microprocessor is a digital signal processor (DSP). Convertible radio wave mode as described in item 1 of the patent application. Page 17 1264882 The digital broadcast receiver includes a control module connected to the microprocessor for controlling the setting of the functional characteristics of the digital broadcast receiver, the selection of the receiving program and the service function, and It can control and select the signal output after the processing by the microprocessor. 5 The digital broadcast receiver of the convertible radio wave mode output according to claim 1 or 4, wherein a playback module is connected to the microprocessor and is used for The audio signal and text graphic information of digital broadcast information content are played. 6. The digital broadcast receiver of the convertible radio wave mode output according to claim 5, wherein the play module comprises a digital/JI ratio converter, and the digital/analog converter is connected to the micro The processing state is connected to a speaker, and receives an audio signal output by the microprocessor to convert the digital form of the audio signal into an analog audio signal, and then transmits the speaker through the speaker. 1 The digital broadcast transceiver of the convertible radio wave mode input according to claim 5, wherein the play module comprises a display ==, the display unit is connected to the microprocessor, and provides display : Graphical or textual information for making or playing, "Information content of the program. 8 U : The convertible radio wave mode transmission broadcast receiver described in Item 1 of the target range includes a channel selection module, f is connected between the receiving module and the microprocessor, and is configured to set - A range of channels that can be searched and searched and detected in this channel Page 18 1264882 VI. Scope of Application Patent The frequency of non-use is measured, and it is selected as the frequency of the FM band emitted by the FM transmitter module. Page 19