JP2513434B2 - Audio noise prevention device for satellite broadcasting - Google Patents
Audio noise prevention device for satellite broadcastingInfo
- Publication number
- JP2513434B2 JP2513434B2 JP31140093A JP31140093A JP2513434B2 JP 2513434 B2 JP2513434 B2 JP 2513434B2 JP 31140093 A JP31140093 A JP 31140093A JP 31140093 A JP31140093 A JP 31140093A JP 2513434 B2 JP2513434 B2 JP 2513434B2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- audio
- code
- satellite broadcasting
- prevention device
- 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.)
- Expired - Fee Related
Links
Landscapes
- Noise Elimination (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は衛星放送の音声ノイズ発
生防止装置に関し、特に衛星放送における送信側での音
声ノイズ発生防止装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an audio noise generation prevention device for satellite broadcasting, and more particularly to an audio noise generation prevention device on the transmission side in satellite broadcasting.
【０００２】[0002]
【従来の技術】従来、衛星放送においては発局切替及び
受信機のチャンネル切替時の受信機での擬似同期検出を
防止するため、図２で示すように音声データ２１を入力
してＰＮ信号付加部２２にて、ＰＮ符号発生部２３から
出力されるＰＮ信号を音声データ領域外に常時、挿入し
音声データ２４を出力している。尚、図３は図２におけ
る入力音声データと、出力音声データの信号フォーマッ
トを示す図である。2. Description of the Related Art Conventionally, in satellite broadcasting, in order to prevent pseudo sync detection at the receiver when switching between the station and the channel of the receiver, as shown in FIG. 2, audio data 21 is input to add a PN signal. In the section 22, the PN signal output from the PN code generating section 23 is constantly inserted outside the audio data area to output the audio data 24. 3 is a diagram showing the signal formats of the input audio data and the output audio data in FIG.
【０００３】[0003]
【発明が解決しようとする課題】この従来のＰＮ信号を
常時、挿入する方式では、音声モードがモノからステレ
オに変化した時、音声モードの切替が音声データの切替
より先行しているので、受信機にて一瞬、耳ざわりな
‘バチ’というＰＮ信号を復号化した音声ノイズが発生
する問題点があった。In the conventional method of always inserting the PN signal, when the audio mode is changed from mono to stereo, the switching of the audio mode precedes the switching of the audio data. There was a problem that voice noise generated by decoding a PN signal called "Bachi" was generated in the machine for a moment.
【０００４】[0004]
【課題を解決するための手段】本発明の衛星放送の音声
ノイズ発生防止装置は、音声モード信号を入力して音声
モード変化を検出してある一定時間のパルス信号を出力
するモード変化検出部と、ＰＮ符号を発生するＰＮ符号
発生部と、前記、パルス信号と符号との論理積をとりＰ
Ｎ信号を出力する信号出力部とを備えている。SUMMARY OF THE INVENTION An audio noise generation preventing apparatus for satellite broadcasting according to the present invention comprises a mode change detecting section for inputting an audio mode signal, detecting an audio mode change, and outputting a pulse signal for a certain period of time. , A PN code generator for generating a PN code and the logical product of the pulse signal and the code, and P
And a signal output section for outputting an N signal.
【０００５】[0005]
【実施例】次に本発明のついて図面を参照して説明す
る。図１は本発明の一実施例の音声ノイズ発生防止装置
である。DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings. FIG. 1 shows an audio noise generation prevention apparatus according to an embodiment of the present invention.
【０００６】図において音声モード信号１１をモード変
化検出部１２に入力し、音声モード変化を検出してある
一定時間のパルス信号１３を出力する。一方、ＰＮ符号
発生部１４からのＰＮ符号１５とパルス信号１３とをＰ
Ｎ信号出力部１６にて論理積をとりＰＮ信号１７を出力
する。従って音声モードが変化した時、ある一定時間、
ＰＮ信号１７はローレベル固定となる。In the figure, a voice mode signal 11 is input to a mode change detection section 12 and a voice signal change is detected and a pulse signal 13 for a certain period of time is output. On the other hand, the PN code 15 and the pulse signal 13 from the PN code generator 14 are set to P
The N signal output unit 16 calculates the logical product and outputs the PN signal 17. Therefore, when the voice mode changes,
The PN signal 17 is fixed at low level.
【０００７】このＰＮ信号１７は、送信側において図２
のＰＮ信号付加部２２にて、音声データ領域外に挿入さ
れる。This PN signal 17 is transmitted by the transmitting side as shown in FIG.
The PN signal adding unit 22 of No. 1 inserts the data outside the voice data area.
【０００８】[0008]
【発明の効果】以上説明したように本発明は、音声モー
ド信号から音声モード変化を検出し、音声モードが変化
した時、ある一定時間、ＰＮ信号をローレベルに固定さ
せることにより、送信側にて音声データ領域外にＰＮ信
号を挿入しても、音声モードがモノからステレオに変化
した時、受信機にて発生する音声ノイズを防止できると
いう効果を有する。As described above, according to the present invention, when the voice mode change is detected from the voice mode signal and the voice mode is changed, the PN signal is fixed to the low level for a certain period of time, so that the transmitting side is not affected. Even if the PN signal is inserted outside the audio data area, it is possible to prevent the audio noise generated in the receiver when the audio mode changes from mono to stereo.
【図１】本発明の一実施例のブロック図。FIG. 1 is a block diagram of an embodiment of the present invention.
【図２】従来の技術を説明する送信側のブロック図と音
声データの概念図。FIG. 2 is a block diagram on the transmission side and a conceptual diagram of audio data for explaining a conventional technique.
【図３】図２における入力音声データと出力音声データ
のフォーマットを示す図。FIG. 3 is a diagram showing formats of input audio data and output audio data in FIG.
１２ モード変化検出部 １４ ＰＮ符号発生部 １６ ＰＮ信号出力部 ２２ ＰＮ信号付加部 ２３ ＰＮ符号発生部 12 Mode Change Detection Section 14 PN Code Generation Section 16 PN Signal Output Section 22 PN Signal Addition Section 23 PN Code Generation Section
Claims (2)
音声モードが変ったとき、所定時間だけＰＮ信号の挿入
を禁止することを特徴とする衛星放送の音声ノイズ発生
防止装置。1. In transmitting satellite broadcast audio data,
An audio noise generation prevention device for satellite broadcasting, characterized in that insertion of a PN signal is prohibited for a predetermined time when the audio mode changes.
信号を入力し音声モード変化を検出してある一定時間の
パルス信号を出力するモード変化検出部と、ＰＮ符号を
発生するＰＮ符号発生部と、前記モード変化検出部から
のパルス信号とＰＮ符号発生部からのＰＮ符号との論理
積をとりＰＮ信号を出力するＰＮ信号出力部とを備える
ことを特徴とする衛星放送の音声ノイズ発生防止装置。2. A mode change detection unit for inputting a voice mode signal and detecting a voice mode change and outputting a pulse signal for a certain period of time at a satellite broadcast transmission side, and a PN code generation unit for generating a PN code. An audio noise generation preventing apparatus for satellite broadcasting, comprising: a PN signal output unit that outputs a PN signal by taking a logical product of the pulse signal from the mode change detection unit and the PN code from the PN code generation unit. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31140093A JP2513434B2 (en) | 1993-12-13 | 1993-12-13 | Audio noise prevention device for satellite broadcasting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31140093A JP2513434B2 (en) | 1993-12-13 | 1993-12-13 | Audio noise prevention device for satellite broadcasting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07162326A JPH07162326A (en) | 1995-06-23 |
| JP2513434B2 true JP2513434B2 (en) | 1996-07-03 |
Family
ID=18016745
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31140093A Expired - Fee Related JP2513434B2 (en) | 1993-12-13 | 1993-12-13 | Audio noise prevention device for satellite broadcasting |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2513434B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100788515B1 (en) | 2005-12-01 | 2007-12-24 | 엘지전자 주식회사 | Method and apparatus for processing audio signal |
-
1993
- 1993-12-13 JP JP31140093A patent/JP2513434B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07162326A (en) | 1995-06-23 |
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