KR20060129583A - Apparatus and method for processing radio text data - Google Patents

Abstract

A radio text data processing device and a method thereof are provided to selectively clear captured text data by deciding whether a clock error is generated by using a detection value, thereby more exactly deciding whether an error of a clock which captures RDS(Radio Data System) broadcasting text data is generated. A text data capture unit(130) instantly captures text data received through radio broadcasting, by using a predetermined periodic clock. A buffer(131) temporarily stores the captured text data in an N-bit unit block. A text generator(132) generates a text image corresponding to the temporarily stored text data. A clock error detector(20) detects whether an error of the clock is generated, in M-bit unit. A microcomputer(27) selectively clears the captured text data according to the detected results.

Description

Apparatus and method for processing radio text data}

1 shows a configuration of a general RDS broadcast receiving terminal,

2 shows a detailed configuration of a text data processing unit of a general RDS broadcast receiving terminal;

FIG. 3 illustrates an embodiment in which noise occurs in an interrupt section for capturing general RDS text data.

4 illustrates a configuration of a radio text data processing apparatus according to the present invention,

5 is a flowchart illustrating an operation of a method for processing radio text data according to the present invention.

※ Explanation of code for main part of drawing

10: tuner unit 11: audio processing unit

12: audio output unit 13: text data processing unit

14 display unit 15 clock generator

16,20: clock error detection unit 17,27: microcomputer

18: memory 130: text data capture

131: buffer 132: character generator

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio text data processing apparatus and method, for example, to a radio in a terminal equipped with a radio data system (RDS) broadcast reception function for transmitting text data in a radio signal. Text data processing apparatus and method.

In general, an RDS broadcast mainly broadcasted in Europe, for example, includes text data transmitted in an FM radio signal, and an RDS broadcast reception terminal capable of receiving the RDS broadcast includes an FM received through an RDS broadcast. In addition to outputting an audio signal of a radio, the text data is captured in blocks of N (eg, N = 26) bits to output and display one character image.

Meanwhile, as shown in FIG. 1, the RDS broadcast receiving terminal includes a tuner unit 10, an audio processor 11, an audio output unit 12, a text data processor 13, a display unit 14, and a clock. The generator 15, the clock error detector 16, the microcomputer 27, the memory 18, and the like may be included.

In addition, the microcomputer 27 operates and tunes the tuner unit 10 according to a user's key input to tune any one RDS broadcast channel, and the audio processor 11 selects the tuned RDS. The audio signal received through the broadcast channel is processed and then output through the audio output unit 12.

In addition, the text data processing unit 13 captures and processes text data received through the tuned RDS broadcast channel, and outputs and displays the text image through the display unit 14, for example. As illustrated in FIG. 2, the text data processing unit 13 may include a text data capture 130, a buffer 131, and a character generator 132.

In the text data capture 130, the text data is sequentially captured using an RDS clock RDS_Clock of a predetermined period generated by the clock generator 15. For example, FIG. 3. As shown in FIG. 6, an interrupt is generated within a predetermined time after the falling edge of the RDS clock to capture text data received through RDS broadcast by 1 bit, and then to the buffer 131. Will be buffered.

In addition, in the character generator 132, after all the text data is buffered in the buffer 131, the text data is read out to generate and output a corresponding character image. For example, 'A' Since 26 bits of text data is required to generate one character, the buffer 131 is buffered with the text data of a 26 bit unit block.

In addition, the clock error detector 16 detects whether an error of an RDS clock, which is a reference for capturing text data, occurs as described above. For example, as illustrated in FIG. When a high pulse is generated in the) section, the clock error detection unit 16 outputs a corresponding detection signal to the microcomputer 27, and the microcomputer 27 detects the detection signal. As a result, it is determined that an error has occurred in the RDS clock, thereby clearing all captured data temporarily stored in the buffer 131.

However, the high pulse generated in the interrupt period as described above may be caused by an RDS clock error, but in addition, it may be temporarily generated by a simple noise component. Although the clock error does not occur, since all captured text data is normally cleared, there is a problem that the text data is processed inefficiently.

Accordingly, the present invention was created to solve the above problems, for example, after capturing text data received through RDS radio broadcasting in blocks of N-bit units using a clock of a predetermined period, Display and output captured text data in units of N bits as a character image, and accurately determine whether an error of the clock is generated by a detection value in units of M bits, so that the captured text data can be efficiently processed. It is an object of the present invention to provide a radio text data processing apparatus and method.

In accordance with another aspect of the present invention, there is provided a radio text data processing method comprising: capturing text data received through radio broadcasting into blocks of N bits using a clock of a predetermined period; And determining whether an error occurs in the clock based on a detection value in units of M bits, and selectively clearing the captured text data.

In addition, the radio text data processing apparatus according to the present invention comprises: capture means for sequentially capturing text data received through radio broadcasting using a clock of a predetermined period; Storage means for temporarily storing the captured text data in blocks of N bits; Generating means for generating a character image corresponding to text data temporarily stored in blocks of N bits; Detection means for detecting whether an error of the clock occurs in units of M bits; And control means for selectively clearing the captured text data according to the detection result.

Hereinafter, exemplary embodiments of a radio text data processing apparatus and method according to the present invention will be described in detail with reference to the accompanying drawings.

First, the apparatus and method for processing radio text data according to the present invention may be applied to an RDS radio broadcast receiving terminal or the like described above with reference to FIG. 1. For example, as shown in FIG. 4, the RDS radio The broadcast receiving terminal includes a text data processing unit 13 including a text data capture 130, a buffer 131, and a character generator 132, a clock error detection unit 20, and a microcomputer 27. do.

The clock error detection unit 20 detects whether an error occurs in the RDS clock, which is a reference for capturing text data, in the text data capture 130. As described above, when a high pulse occurs in an interrupt section, a value of '1' of 1 bit is set, and a series of detecting whether a high pulse occurs in the next interrupt section is set. The detection operation is repeated a predetermined number of times.

For example, when all of the high pulses are detected in the first to eighth interrupt periods, the clock error detector 20 outputs the corresponding 8-bit detection value '11111111' to the microcomputer 27. If all high pulses are not detected in the first to eighth interrupt periods, the corresponding 8-bit detection value '00000000' is output to the microcomputer 27.

When the clock error detection unit 20 outputs an 8-bit detection value '11111111', the microcomputer 27 determines that a clock error has occurred and clears the text data temporarily stored in the buffer 131. (Clear), and if a detection value of 8 bits other than '11111111', for example, a detection value in which any one of '0' is present among 8 bits is detected, it is discriminated by simple noise generation. Thus, the text data temporarily stored in the buffer 131 is not cleared.

As a result, when a high pulse is generated temporarily by simple noise, the captured text data is processed normally.

5 is a flowchart illustrating an operation of a method for processing radio text data according to the present invention. For example, in the microcomputer 27, as described above with reference to FIG. 1, according to a user's key input, FIG. Operation of the tuner unit 10 controls the tuning of any one RDS broadcast channel, and the audio processing unit 11 processes the audio signal received through the tuned RDS broadcast channel, and then outputs the audio. It outputs through the unit 12 (S10).

In the text data capture 130, the text data is sequentially captured by using an RDS clock RDS_Clock of a predetermined period generated by the clock generator 15. As described above, an interrupt is generated within a predetermined time after the falling edge of the RDS clock to capture text data received through the RDS broadcast by 1 bit, and 26 bit units are stored in the buffer 131. Buffered to block (S11).

Meanwhile, the clock error detection unit 20 detects whether an error of an RDS clock, which is a reference for capturing text data, occurs as described above (S12). For example, as shown in FIG. In the Interrupt section, if a high pulse is detected (S13), a value of '1' of one bit is set (S14). If a high pulse is not detected, a value of '0' of one bit is set. It is made (S15).

In addition, the clock error detection unit 20 repeats the above-described operation eight times, and outputs an 8-bit clock error detection value to the microcomputer 27. In the microcomputer 27, the 8-bit When the clock error detection value is received (S16), the detection value is checked. For example, when the detection values of the 8 bits are all '1', that is, when the clock error detection value is '11111111' (S17), After determining that an error has occurred in the RDS clock, the microcomputer 27 clears all text data temporarily stored in the buffer 131 (S18).

On the other hand, if any one of '0' is present among the 8-bit detection values, it is determined as a simple noise generation, and thus the text generator is not cleared temporarily because the text data is temporarily stored in the buffer 131. In 132, the text data of the 26-bit unit block captured by the normal RDS clock is generated and output as one character image (eg, 'A').

In addition, since the above-described series of operations are repeatedly performed until the reception of the RDS radio broadcast is stopped (S20), it is possible to more accurately determine whether an error of the RDS clock has occurred, so that the normally captured text data is temporarily noisy. It is possible to prevent the wrong clearing.

Meanwhile, the clock error detection unit 20 detects a clock error bit detection value of another M bit, for example, a clock error bit value of 2 bits or more and 25 bits or less instead of an 8 bit clock error detection value, and detects the microcomputer ( 27).

Or more, preferred embodiments of the present invention described above, for the purpose of illustration, those skilled in the art, within the technical spirit and the technical scope of the present invention disclosed in the appended claims below, to further improve various other embodiments Changes, substitutions or additions will be possible.

The apparatus and method for radio text data processing according to the present invention constructed and constructed as described above, for example, in a terminal equipped with a radio data system (RDS) broadcast reception function for transmitting text data in a radio signal, are RDS. When receiving a radio broadcast, the text data received through the RDS radio broadcast is captured in blocks of N bits using a clock of a predetermined period, and then the captured N bits of text data as a character image are captured. Output is displayed, and whether or not an error of the clock is determined by a detection value in units of M bits, and selectively clearing the captured text data, thereby causing an error of a clock capturing text data of an RDS broadcast. Can be determined more accurately, and the text data captured normally can generate simple noise. Due to the very useful inventions that can be effectively prevented from being cleared incorrectly.

Claims (14)

Capturing text data received through a radio broadcast into blocks of N bits using a clock of a predetermined period; And And determining whether an error occurs in the clock based on a detection value in units of M bits, and selectively clearing the captured text data. The method of claim 1, In the first step, the text data received through a radio data system (RDS) broadcast is generated by generating an interrupt based on a clock polling edge of a predetermined period and capturing the data into blocks of 26 bits. Text data processing method. The method of claim 2, In the second step, if a high pulse is detected within a predetermined time after the clock polling edge, '1' is set; otherwise, '0' is set to generate a detection value in units of M bits, and then detect the high pulse. And determining whether a clock error or noise occurs according to a value. The method of claim 3, wherein In step 2, when the detection values of the M bit unit are all '1', it is determined that a clock error has occurred, and the captured text data is cleared. The method of claim 3, wherein In step 2, when at least one bit of the M-bit detection value is '0', it is determined that noise has occurred, and the captured text data is not cleared. . The method of claim 4, wherein And generating and displaying a character image corresponding to the text data when the text data which is not cleared becomes a block of N bits. The method of claim 1, The N bit is a number of bits of 2 or more and 25 or less bits. Capturing means for capturing text data received through radio broadcasting sequentially using a clock of a predetermined period; Storage means for temporarily storing the captured text data in blocks of N bits; Generating means for generating a character image corresponding to text data temporarily stored in blocks of N bits; Detection means for detecting whether an error of the clock occurs in units of M bits; And And control means for selectively clearing the captured text data according to the detection result. The method of claim 8, The capturing means is configured to capture text data received through radio data system (RDS) broadcasting within a predetermined time by generating an interrupt based on a clock polling edge of a predetermined period. Device. The method of claim 8, And the storage means buffers the captured text data in blocks of 26 bits. The method of claim 8, The detecting means sets a value of '1' if a high pulse is detected within a predetermined time after the clock polling edge of the predetermined period, and sets a value of '0' if not detected to output a detection value in units of M bits. A radio text data processing device. The method of claim 11, And the control means determines that a clock error has occurred when all of the detected values of the M bits unit are '1', thereby clearing the captured text data. The method of claim 11, The control means, when at least one bit of the detection value of the M-bit unit is '0', determines that noise has occurred, and does not clear the captured text data, characterized in that the radio text data processing apparatus . The method of claim 8, And said N bits are the number of bits of 2 or more and 25 or less bits.

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