WO2000038357A1 - Recepteur de radiodiffusion numerique - Google Patents

Recepteur de radiodiffusion numerique Download PDF

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Publication number
WO2000038357A1
WO2000038357A1 PCT/JP1998/005833 JP9805833W WO0038357A1 WO 2000038357 A1 WO2000038357 A1 WO 2000038357A1 JP 9805833 W JP9805833 W JP 9805833W WO 0038357 A1 WO0038357 A1 WO 0038357A1
Authority
WO
WIPO (PCT)
Prior art keywords
channel
bit rate
data
broadcast receiver
time
Prior art date
Application number
PCT/JP1998/005833
Other languages
English (en)
Japanese (ja)
Inventor
Yoshikazu Otsubo
Original Assignee
Sanyo Electric Co., Ltd.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to JP30259897A priority Critical patent/JP3291458B2/ja
Application filed by Sanyo Electric Co., Ltd. filed Critical Sanyo Electric Co., Ltd.
Priority to CNB988136740A priority patent/CN1134914C/zh
Priority to KR1020007009142A priority patent/KR20010041101A/ko
Priority to PCT/JP1998/005833 priority patent/WO2000038357A1/fr
Publication of WO2000038357A1 publication Critical patent/WO2000038357A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H40/00—Arrangements specially adapted for receiving broadcast information
    • H04H40/18—Arrangements characterised by circuits or components specially adapted for receiving

Definitions

  • the present invention relates to a receiver for receiving digital broadcasting, and relates to a preset technique for storing information on a receiving broadcasting station in the receiver in advance.
  • Conventional radio receivers have a so-called preset function that stores the reception frequencies of some of the ⁇ ⁇ stations that can be received in association with a specific preset number, and can easily select the stations thereafter. Some have.
  • the auto scan function For the radio reception with this preset function, in order to omit the operation of memorizing one station at a time, and to simplify the operation of storing in the preset memory, use the auto scan function to start from the lowest frequency of the reception range. Some have an auto-preset function that scans the highest frequency and stores the received frequency in the memory for sequential preset next.
  • the present invention has been made in view of the above circumstances, and has been developed in a receiver for receiving ⁇ in which data of a large number of channels is multiplexed, which provides higher quality or more various services.
  • the technical task is to auto-preset high-frequency channels. Disclosure of the invention
  • a satellite broadcast receiver is a digital broadcast receiver that receives a time-division multiplexed signal of a plurality of channels having different bit rates.
  • Data extracting means for extracting the data of a specific channel from the data, bit rate detecting means for detecting the bit rate of the channel, and preset memory for storing received channel information.
  • the channel information is stored in the preset memory according to the value of the bit rate detected by, and the data extracting means extracts data of the channel specified by the stored channel information.
  • FIG. 1 is a block diagram of a digital signal receiver according to the present invention.
  • FIG. 2 is a diagram illustrating a frame configuration of a channel data according to the present invention.
  • FIG. 3 is a schematic diagram of the operation of the T D ⁇ demodulation circuit according to the present invention.
  • FIG. 4 is a control flowchart according to the first embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a memory table list according to the present invention.
  • FIG. 6 is a flowchart of control according to a second embodiment of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION
  • FIG. 1 is a block diagram of a digital broadcast receiver according to the present invention.
  • (1) is an antenna that receives radio waves from broadcast satellites.
  • the data of each channel of the broadcast wave from the broadcast satellite is multiplexed by the TDM (time division multiplexing) method and transmitted after QPSK modulation.
  • FIG. 2 shows a frame configuration of the channel data according to the TDM method.
  • the time width of each time slot is equal, and the number of bits in each time slot is also equal.
  • (2) is an RF front-end processing unit, which selects a specific broadcast wave from radio waves received by the antenna (1) and converts it into an intermediate frequency.
  • This RF front-end processing unit (2) performs processing by a synthesizer method using a PLL circuit (3) including a programmable frequency divider. At this time, the frequency division ratio of the programmable frequency divider is adjusted by the microcomputer (4). The receiving frequency is controlled by the instruction.
  • (5) is a QPSK demodulation circuit, to which the output of the RF front-end processing unit (2) is input, and a baseband signal is demodulated from the phase-modulated carrier.
  • This demodulation is performed by a synchronous detection method.
  • This synchronous detection method is a well-known technique, and a detailed description thereof will be omitted.
  • the TD @ demodulation circuit (6) is a TDM demodulation circuit, which is supplied with the output signal of the QPSK demodulation circuit (5) and forms and outputs data for each channel.
  • the TD @ frame synchronization detection section (7) first establishes frame synchronization based on the synchronization signal, and after the frame synchronization is established, the TDM header reading section (8) decodes the header section. One night is read by the microcomputer (4).
  • the header section includes lapels 1 to ⁇ , which are ID numbers for identifying which channel each time slot 1 to ⁇ of the TDM corresponds to.
  • the microcomputer (4) reads from the header which time slot contains the data of the channel to be received, and inputs the slot number (one or more) to the channel decoder circuit (9).
  • the channel decoder circuit (9) synthesizes the data included in the time slot of the time slot number input from the microcomputer (4) and reconfigures the data of one channel.
  • the TDM demodulation circuit (6) performs the operation shown in FIG.
  • This example shows a case where four channels (A, ⁇ , C, D) are divided and multiplexed into seven time slots (slots 1 to 7) for transmission.
  • Channel ⁇ is transmitted using time slots 1, 4, and 6, and the channel is extracted by extracting time slots 1, 4, and 6 from the TDM bit stream for each frame and combining them. A night out of A is taken out.
  • the microcomputer (4) has memories P (1) to P (T) for presetting, and the tuning information (label or label) of the broadcasting station detected by the flow preset processing shown in FIG. (Slot number) is stored.
  • Reference numeral (10) denotes an operation switch unit, which has a preset switch (# 1 to # 1) for calling a stored broadcast station and a preset start switch (S).
  • the microcomputer (4) performs auto-preset processing under program control.
  • Various methods are conceivable for this program control, and examples will be described below.
  • the first embodiment checks how many timeslots are used for each channel, stores them in the work memory, and then stores them in the preset memory in order from the channel with the largest number of used time slots.
  • the control is performed according to the flowchart of FIG.
  • n The total number of time slots in one frame of TDM, which is a predetermined value.
  • COUNT Variable indicating the number of time slots used by one channel.
  • step 1 initial values are set in step 1, the initial values of variables I and M are set to 1, and the value of each label check flag LABEL_CHK (i) to LABEL—CHK (n) is set to 0. Set.
  • step 2 the value of the number of used time slots C ⁇ UNT is reset.
  • step 3 the value of the label check flag LABEL_CHK (i) of the target label is checked in step 3 to check whether or not the check has already been completed.
  • step 4 the value of the variable K is set to i.
  • step 5 the label value of time slot K matches the label value of time slot i.
  • the lapel check flag LABEL_CHK (i) of lapel i is set to 1, and a flag indicating that the check has been completed for i is set.
  • step 8 the value of the variable K is incremented, and in step 9, it is checked whether the value of K has exceeded the total number n of time slots in one frame of TDM.
  • step 5 to step 9 is repeated again.
  • step 11 the value of M is incremented, and in step 12 the value of i is incremented.
  • step 13 the value of i is compared with the value of n.
  • control is returned to step 2 and steps 2 to 13 are performed again to check all the channels. As a result, the following operation is performed.
  • the bit rate of each channel is a x number of used slots (COUNT) / Tf.
  • the flag LABELJHK (i) which indicates that other slots with the same lapel A have been checked, is set to 1.
  • step 13 if i exceeds the value of n, reference is made to the above table list in step 14, and T labels are stored from the top of the count number in preset memories P (1) to P (T) To memorize.
  • the preset memory method may be to store the upper T counts in the order of the list, or to store them in descending order of the count.
  • a time slot number (one representative or all slot numbers of the same channel) may be stored in a preset memory.
  • the preset switches P1 to PT are operated after the preset is completed, the number of the time slot having the same label as the lapel of the corresponding memory is input to the channel decoder. And the channel data is played.
  • the label of the header is checked in order, the number of used slots is detected by counting for each corresponding channel, a table list is created, and a preset is made by referring to this value. Control is performed according to the flowchart shown in FIG.
  • the variables used in this control method are as follows.
  • n Total number of time slots in one frame of TDM, which is a predetermined value.
  • LIST (M, 1) An array variable that stores the number of used slots corresponding to each channel.
  • LABEL (1) is set in LIST (1, 0).
  • LIST (1, 1) is set to 1. Also, the initial values of i and M are
  • step 22 it is determined whether or not the same as LABEL (i) exists in LIST (1, 0) to LIST (M-1, 0).
  • LABEL (i) is added to LIST (MJ) as a new channel in step 23. And set LIST (M, 1) to 1. After that, the value of M is incremented.
  • step 22 if the same as LABEL (i) exists in LIST (1, 0) to LIST (Ml, 0), LABEL (i) of the channel already set in step 24 Increment the corresponding LIST (*, 1) value. Then, the value of i is incremented in step 25, and steps 22 to 25 are repeated until i exceeds n in step 26.
  • step 26 If i exceeds n in step 26, the label is stored in the T preset memories P (1) to P (T) from the upper count by referring to the table list in step 27.
  • a digital signal in which a large number of channel data are multiplexed can be used for presetting in order from a channel having a higher bit rate.
  • the number of use of the time slot, that is, the release with a large bit rate is preferentially preset.
  • the transmission bit rate is represented by the product of the sampling frequency and the number of quantization bits (when uncompressed).
  • the higher the bit rate the higher the sound quality.
  • the present invention is suitable for use in a digital satellite broadcast receiver for receiving a digital broadcast signal in which a large number of channels are multiplexed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Circuits Of Receivers In General (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)

Abstract

La présente invention concerne un récepteur recevant des données radiodiffusées ou multiplexées dans plusieurs canaux, parmi lesquels un canal à débit binaire élevé, de meilleur qualité ou offrant des services plus variés, est préréglé automatiquement. Plus particulièrement, un récepteur de radiodiffusion numérique recevant un signal qui représente les données multiplexées par répartition dans le temps de canaux à débits binaires différents, comprend un dispositif d'extraction de données utilisé pour extraire, dans un canal spécifique, les données d'un signal multiplexé par répartition dans le temps. En outre, ce récepteur comprend un dispositif de mesure du débit binaire utilisé pour mesurer le débit binaire du canal spécifique, et une mémoire préréglée contenant les informations relatives aux canaux reçus. Dans cette mémoire, les informations de canaux sont stockées en fonction de la valeur du débit binaire. Le dispositif d'extraction de données extrait les données dans le canal spécifié par les informations de canaux mémorisés, permettant ainsi de sélectionner un canal donné.
PCT/JP1998/005833 1997-11-05 1998-12-21 Recepteur de radiodiffusion numerique WO2000038357A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP30259897A JP3291458B2 (ja) 1997-11-05 1997-11-05 ディジタル放送受信機
CNB988136740A CN1134914C (zh) 1998-12-21 1998-12-21 数字广播接收机
KR1020007009142A KR20010041101A (ko) 1998-12-21 1998-12-21 디지털 방송 수신기
PCT/JP1998/005833 WO2000038357A1 (fr) 1997-11-05 1998-12-21 Recepteur de radiodiffusion numerique

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP30259897A JP3291458B2 (ja) 1997-11-05 1997-11-05 ディジタル放送受信機
PCT/JP1998/005833 WO2000038357A1 (fr) 1997-11-05 1998-12-21 Recepteur de radiodiffusion numerique

Publications (1)

Publication Number Publication Date
WO2000038357A1 true WO2000038357A1 (fr) 2000-06-29

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PCT/JP1998/005833 WO2000038357A1 (fr) 1997-11-05 1998-12-21 Recepteur de radiodiffusion numerique

Country Status (2)

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JP (1) JP3291458B2 (fr)
WO (1) WO2000038357A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010113168A (ko) * 2000-06-16 2001-12-28 황언구 무선통신망을 이용한 다중 디지털 정보 제공 시스템 및 그정보 제공 시스템에서의 정보 제공방법
JP5834824B2 (ja) * 2011-11-25 2015-12-24 ソニー株式会社 チャンネルスキャン装置および方法、並びにプログラム

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04357725A (ja) * 1991-06-04 1992-12-10 Fujitsu Ltd プリント板ユニット間信号伝送方式
JPH05218914A (ja) * 1991-06-28 1993-08-27 Mitsubishi Electric Corp 汎用復調装置および通信波形解析装置
JPH0732377B2 (ja) * 1989-07-11 1995-04-10 日本電気株式会社 データ放送番組のチヤンネル選択方式
JPH0946304A (ja) * 1995-07-25 1997-02-14 Matsushita Electric Ind Co Ltd 受信装置
JPH09149388A (ja) * 1995-08-22 1997-06-06 Digi Media Vision Ltd 複数デジタル信号伝送方法及び複数デジタル信号送信機並びに統計的多重化装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0732377B2 (ja) * 1989-07-11 1995-04-10 日本電気株式会社 データ放送番組のチヤンネル選択方式
JPH04357725A (ja) * 1991-06-04 1992-12-10 Fujitsu Ltd プリント板ユニット間信号伝送方式
JPH05218914A (ja) * 1991-06-28 1993-08-27 Mitsubishi Electric Corp 汎用復調装置および通信波形解析装置
JPH0946304A (ja) * 1995-07-25 1997-02-14 Matsushita Electric Ind Co Ltd 受信装置
JPH09149388A (ja) * 1995-08-22 1997-06-06 Digi Media Vision Ltd 複数デジタル信号伝送方法及び複数デジタル信号送信機並びに統計的多重化装置

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Publication number Publication date
JP3291458B2 (ja) 2002-06-10
JPH11146290A (ja) 1999-05-28

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