KR960020009A - Frequency conversion method of digital audio system - Google Patents
Frequency conversion method of digital audio system Download PDFInfo
- Publication number
- KR960020009A KR960020009A KR1019940030055A KR19940030055A KR960020009A KR 960020009 A KR960020009 A KR 960020009A KR 1019940030055 A KR1019940030055 A KR 1019940030055A KR 19940030055 A KR19940030055 A KR 19940030055A KR 960020009 A KR960020009 A KR 960020009A
- Authority
- KR
- South Korea
- Prior art keywords
- frequency
- conversion
- present
- sampling frequency
- filter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
- 238000006243 chemical reaction Methods 0.000 title abstract 5
- 238000000034 method Methods 0.000 title abstract 4
- 238000005070 sampling Methods 0.000 claims abstract 4
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Analogue/Digital Conversion (AREA)
Abstract
본 발명은 디지탈 오디오 시스템의 주파수 변환 방법에 관한 것으로, 종래에는 아날로그 방식의 경우 D/A 변환 및 A/D 변환시 잡음이 혼입될 수 있으며 저역 통과 팔터를 아날로그 영역에서 설계하여야 하므로 시스템이 복잡해짐과 아울러 가격도 상승하는 문제점이 있고 또한, 디지탈 방식의 경우 전달 함수(h[k])에 대한 조건으로써 샐플링 주파수에 대한 컷오프 주파수가 1/(2M) 또는 1/(2L)로 너무 작기 때문에 필터 설계상의 문제점이 있다. 이러한 문제점을 개선하기 위하여 본 발명은 임의의 위치에서 소정 개의 샘플로 보간을 하여 샘플링 주파수 값을 산출하는 동작을 입력에 대해 분할한 각 위치에서 순차적으로 반복하여 샘플링 주파수 변환을 수행하도록 구성한 것으로, 본 발명은 필터를 사용함이 없이 일정 간격으로 분할한 입력 신호의 각 위치에서 보간을 수행하여 주파수를 변환하므로써 계산량을 줄임에 의해 연산 속도를 향상시키고 회로를 간단하게 구현할 수 있다.The present invention relates to a frequency conversion method of a digital audio system. Conventionally, in the analog method, noise may be mixed during D / A conversion and A / D conversion, and the low pass filter has to be designed in the analog area. In addition, there is a problem that the price increases, and in the case of the digital method, the filter is because the cutoff frequency for the sampling frequency is too small as 1 / (2M) or 1 / (2L) as a condition for the transfer function h [k]. There is a design problem. In order to solve this problem, the present invention is configured to perform sampling frequency conversion by sequentially repeating an operation of calculating a sampling frequency value by interpolating a predetermined number of samples at an arbitrary position at each divided position for an input. According to the present invention, it is possible to improve the computation speed and simplify the circuit by reducing the amount of calculation by converting the frequency by performing interpolation at each position of the input signal divided at regular intervals without using a filter.
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.
제3도는 본 발명 실시예의 블럭도,3 is a block diagram of an embodiment of the present invention;
제4도는 본 발명의 보간을 보인 파형도.4 is a waveform diagram showing interpolation of the present invention.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019940030055A KR960020009A (en) | 1994-11-16 | 1994-11-16 | Frequency conversion method of digital audio system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019940030055A KR960020009A (en) | 1994-11-16 | 1994-11-16 | Frequency conversion method of digital audio system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| KR960020009A true KR960020009A (en) | 1996-06-17 |
Family
ID=66648487
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019940030055A Ceased KR960020009A (en) | 1994-11-16 | 1994-11-16 | Frequency conversion method of digital audio system |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR960020009A (en) |
-
1994
- 1994-11-16 KR KR1019940030055A patent/KR960020009A/en not_active Ceased
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A201 | Request for examination | ||
| PA0109 | Patent application |
Patent event code: PA01091R01D Comment text: Patent Application Patent event date: 19941116 |
|
| PA0201 | Request for examination |
Patent event code: PA02012R01D Patent event date: 19941116 Comment text: Request for Examination of Application |
|
| PG1501 | Laying open of application | ||
| E902 | Notification of reason for refusal | ||
| PE0902 | Notice of grounds for rejection |
Comment text: Notification of reason for refusal Patent event date: 19970620 Patent event code: PE09021S01D |
|
| E601 | Decision to refuse application | ||
| PE0601 | Decision on rejection of patent |
Patent event date: 19971010 Comment text: Decision to Refuse Application Patent event code: PE06012S01D Patent event date: 19970620 Comment text: Notification of reason for refusal Patent event code: PE06011S01I |