JP5422276B2 - 無線映像送信装置 - Google Patents
無線映像送信装置 Download PDFInfo
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- JP5422276B2 JP5422276B2 JP2009158362A JP2009158362A JP5422276B2 JP 5422276 B2 JP5422276 B2 JP 5422276B2 JP 2009158362 A JP2009158362 A JP 2009158362A JP 2009158362 A JP2009158362 A JP 2009158362A JP 5422276 B2 JP5422276 B2 JP 5422276B2
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- 230000005540 biological transmission Effects 0.000 title claims description 200
- 238000000034 method Methods 0.000 description 56
- 238000012545 processing Methods 0.000 description 33
- 230000004044 response Effects 0.000 description 16
- 238000004891 communication Methods 0.000 description 15
- 238000005259 measurement Methods 0.000 description 15
- 230000005236 sound signal Effects 0.000 description 15
- 238000010586 diagram Methods 0.000 description 9
- 230000004043 responsiveness Effects 0.000 description 7
- 230000001276 controlling effect Effects 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 238000012790 confirmation Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/10—Adaptations for transmission by electrical cable
- H04N7/106—Adaptations for transmission by electrical cable for domestic distribution
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/08—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division
- H04N7/087—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only
- H04N7/088—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only the inserted signal being digital
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/4104—Peripherals receiving signals from specially adapted client devices
- H04N21/4122—Peripherals receiving signals from specially adapted client devices additional display device, e.g. video projector
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/4104—Peripherals receiving signals from specially adapted client devices
- H04N21/4126—The peripheral being portable, e.g. PDAs or mobile phones
- H04N21/41265—The peripheral being portable, e.g. PDAs or mobile phones having a remote control device for bidirectional communication between the remote control device and client device
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/422—Input-only peripherals, i.e. input devices connected to specially adapted client devices, e.g. global positioning system [GPS]
- H04N21/42204—User interfaces specially adapted for controlling a client device through a remote control device; Remote control devices therefor
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/422—Input-only peripherals, i.e. input devices connected to specially adapted client devices, e.g. global positioning system [GPS]
- H04N21/42204—User interfaces specially adapted for controlling a client device through a remote control device; Remote control devices therefor
- H04N21/42206—User interfaces specially adapted for controlling a client device through a remote control device; Remote control devices therefor characterized by hardware details
- H04N21/42208—Display device provided on the remote control
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/435—Processing of additional data, e.g. decrypting of additional data, reconstructing software from modules extracted from the transport stream
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
- H04N21/4363—Adapting the video stream to a specific local network, e.g. a Bluetooth® network
- H04N21/43637—Adapting the video stream to a specific local network, e.g. a Bluetooth® network involving a wireless protocol, e.g. Bluetooth, RF or wireless LAN [IEEE 802.11]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/20—Adaptations for transmission via a GHz frequency band, e.g. via satellite
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Human Computer Interaction (AREA)
- Selective Calling Equipment (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
- Closed-Circuit Television Systems (AREA)
Description
1、2、3、4、5、6,7,8,9,10,11,12,13,14,15・・・
と割り当てる。一方、<User Control Pressed>受信後は、Nの値を
1、2,3,4,1,5,6,7,1,8,9,10,1,11,12.13・・・
として、受信装置#1に対する伝送可能期間を周期的に割り当てる。
1、2、1、3、1、2、1、4、1、2、1、5、1、2、1、3、・・・
また、下記のように、所定制御コマンド受信のための伝送可能期間(#1)、及び所定制御コマンド送信ための伝送可能期間(#2)を3フレームに1回の頻度で周期的に割り当ててもよい。
以上説明したように、本実施例によれば、映像送信装置から複数の映像受信装置に無線にて映像・音声信号を伝送するシステムにおいて、優先度の高い特定の制御コマンドを伝送する或いは伝送すると予想される特定の無線映像受信装置に対して、制御コマンドの伝送が許可される伝送可能期間を、制御コマンド伝送周期において他の無線映像受信装置よりも優先的に割り当てるようにしている。このため、特定の無線映像受信装置に対する伝送可能期間を他の映像受信装置に比べ拡大することができ、システムの応答性と安定性を向上させることが可能となる。
16.7ms×(4×1)=66.8ms
16.7ms×(4×2)=133.6ms
16.7ms×(4×3)=200.4ms
といった周期的な値と、
420ms、440ms、460ms、480msといった離散的な値を格納しておくことで、コマンドを送信してくる可能性の高い期間に、無線映像送信装置と無線映像受信装置間の相互通信のタイムラグを小さくすることが可能となる。
13 信号処理部
14 CPU(制御部)
15 変調復調部
16 送受信部
17 アンテナ
100 無線ネットワーク
101 無線映像受信群
102 無線映像送信装置
103 AV機器
104 AV機器
106 無線映像受信装置
107 無線映像受信装置
108 無線映像受信装置
109 無線映像受信装置
110 無線映像受信装置
200 映像信号
600 コマンド受信部
601 割り当て処理解除判断部
602 タイムアウト処理判断部
603 コマンド受信後からの時間計測部
604 受信後計測時間判断部1
605 優先割り当て処理部1
606 優先割り当て解除処理部1
700 コマンド送信部
701 送信コマンド判断部
702 コマンド送信後からの時間計測部
703 送信後計測時間判断部1
900 割り当て処理解除判断部
901 受信後計測時間判断部2
902 受信後計測時間一致処理部
903 アドレス格納処理部1
904 処理無し
905 優先割り当て解除処理部2
1000 送信後計測時間判断部2
1001 送信後計測時間一致処理部
1002 アドレス格納処理部2
1100 記憶領域1に対する判断部
1101 優先割り当て処理部2
1102 記憶領域2に対する判断部
1103 優先割り当て処理部3
1104 順次割り当て処理部
Claims (10)
- 複数の映像受信装置に無線により映像信号を送信するように構成された映像送信装置において、
前記映像受信装置からコマンドを受信する受信部と、
前記受信部で受信されたコマンドが所定コマンドか否かを判定する制御部と、を備え、
前記映像送信装置が無線で送信する映像信号の各フレームの垂直帰線期間が、各前記映像受信装置がコマンドを伝送するための伝送可能期間として割り当てられており、
前記制御部は、前記受信コマンドが所定コマンドであると判定した場合には、前記複数の映像受信装置の全てがコマンドを伝送することが可能なコマンド伝送周期において、当該所定コマンドを送信した映像受信装置の前記伝送可能期間を、他の映像受信装置各前記伝送可能期間よりも多く割り当てるように、前記垂直帰線期間毎に前記各映像受信装置の前記伝送可能期間の割り当てを制御することを特徴とする映像送信装置。 - 前記各フレームの映像信号にはヘッダーが付されており、該ヘッダーは前記複数の映像受信装置の一つのID番号を含み、前記各フレームの映像信号の垂直帰線期間が、各映像信号のヘッダーに記述されたID番号に対応する映像受信装置の前記伝送可能期間として割り当てられており、
前記制御部は、前記受信コマンドが所定コマンドであると判定した場合に、前記コマンド伝送周期において、前記所定コマンドを送信した映像受信装置に対応するID番号を含むヘッダーが、他の映像受信装置に対応するID番号を含むヘッダーよりも多くなるように前記ヘッダーのID番号を変更することで、前記所定コマンドを送信した映像受信装置の前記伝送可能期間を、他の映像受信装置各前記伝送可能期間よりも多く割り当てるように制御することを特徴とする請求項1に記載の映像送信装置。 - 前記制御部は、リモコン信号の伝送に係るコマンドを受信した際に、そのコマンドを送信した前記映像受信装置に対して、所定期間又はリモコン解除コマンド受信までの間、優先的に前記伝送可能期間を割り当てることを特徴とする請求項2に記載の映像送信装置。
- 前記優先的に前記伝送可能期間を割り当てる周期は、前記映像受信装置の総数よりも少ないことを特徴とする請求項3記載の映像送信装置。
- 前記コマンド受信時における前記伝送可能期間内の前記割り当てを、
前記コマンド受信後から、0ms〜350msよりも350msから600msの方で多くすることを特徴とする請求項1に記載の映像送信装置。 - 少なくとも1つ以上の映像受信装置に映像信号を送信するように構成された映像送信装置において、
前記映像受信装置からコマンドを受信し、前記映像受信装置へコマンドを送信する送受信部と、
前記コマンドの伝送に使用される伝送可能期間の割り当てを制御するための制御部と、を備え
前記映像送信装置が無線で送信する映像信号の各フレームの垂直帰線期間が、前記各映像受信装置が前記コマンドを伝送するための伝送可能期間として割り当てられており、
前記制御部は、前記複数の映像受信装置の全てがコマンドを伝送することが可能なコマンド伝送周期において、前記送受信部が送信するコマンドまたは受信するコマンドが所定のコマンドである場合は、当該所定コマンドを受信又は送信する映像受信装置の前記伝送可能期間を、他の映像受信装置の前記伝送可能期間よりも多く割り当てるように、前記垂直帰線期間毎に前記各映像受信装置の前記伝送可能期間の割り当てを制御することを特徴とする映像送信装置。 - 前記各フレームの映像信号にはヘッダーが付されており、該ヘッダーは前記複数の映像受信装置の一つのID番号を含み、前記各フレームの映像信号の垂直帰線期間が、各映像信号のヘッダーに記述されたID番号に対応する映像受信装置の前記伝送可能期間として割り当てられており、
前記制御部は、前記受信コマンドが所定コマンドであると判定した場合に、前記コマンド伝送周期において、前記所定コマンドを送信又は受信した映像受信装置に対応するID番号を含むヘッダーが、他の映像受信装置に対応するID番号を含むヘッダーよりも多くなるように前記ヘッダーのID番号を変更することで、前記所定コマンドを送信した映像受信装置の前記伝送可能期間を、他の映像受信装置各前記伝送可能期間よりも多く割り当てるように制御することを特徴とする請求項6に記載の映像送信装置。 - 返信が必要なコマンドを送信した際に、そのコマンドを受信した前記映像受信装置に対して、所定期間又は返信コマンド受信までの間、優先的に前記コマンド送信期間を割り当てることを特徴とする請求項7に記載の映像送信装置。
- 前記制御部は、
フレーム周波数30Hz超える場合は、1垂直帰線期間に1つの映像受信装置を割り当て、
フレーム周波数が30Hz以下の場合は、1垂直帰線期間に少なくとも二つ以上の前記映像受信装置を割り当てることを特徴とする請求項2又は7記載の映像送信装置。 - 前記コマンド伝送周期は、前記映像受信装置の数と等しいフレーム数の周期であることを特徴とする請求項1又は6に記載の映像送信装置。
Priority Applications (3)
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JP2009158362A JP5422276B2 (ja) | 2009-07-03 | 2009-07-03 | 無線映像送信装置 |
US12/784,118 US8732769B2 (en) | 2009-07-03 | 2010-05-20 | Wireless video transmitter |
CN201010189737.4A CN101945242B (zh) | 2009-07-03 | 2010-05-24 | 无线影像发送装置 |
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JP2009158362A JP5422276B2 (ja) | 2009-07-03 | 2009-07-03 | 無線映像送信装置 |
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JP2011015246A JP2011015246A (ja) | 2011-01-20 |
JP5422276B2 true JP5422276B2 (ja) | 2014-02-19 |
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JP (1) | JP5422276B2 (ja) |
CN (1) | CN101945242B (ja) |
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JP2011015246A (ja) | 2011-01-20 |
US20110004909A1 (en) | 2011-01-06 |
US8732769B2 (en) | 2014-05-20 |
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