JP4703858B2 - Music distribution system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a music distribution system and a wireless terminal for distributing 1 to n broadcast-type music and audio information using a wireless base station and a wireless terminal.
[0002]
[Prior art]
Currently, music CD stores and the like have adopted a system in which a desired CD is played on a CD player and viewed with headphones connected to the CD player. In this system, the types of CDs to be played are limited, the number of CD players and headphones is one-to-one, so the number of people that can be auditioned is limited. There are also problems such as becoming.
[0003]
Currently, a wireless transmission system using the 2.4 GHz band has been put into practical use. Communication using the IEEE802.11 wireless LAN standard enables communication at a maximum transfer rate of 11 Mbps. Similarly, a device capable of communicating at a maximum transfer rate of 2 Mbps under the BLUETOOTH standard is about to be commercialized.
[0004]
Currently, there is a demand for a wireless access system capable of accessing such a large volume of data, which has been studied by IEEE 802.11 (US), ATM Forum (US), ETSI-BRAN (Europe), MMAC (Japan), etc. ing.
[0005]
Looking at the wireless access systems being studied in MMAC, using the frequency bands of 5 [GHz] and 25 [GHz], outdoors 20 [Mbps] or more (1 user maximum 10 [Mbps]), indoor 156 [Mbps] The target is information transmission speed. Among these, in the 5 [GHz] band, the OFDM method is used as a wireless method, and a transmission speed of 20 [Mbps] or more is targeted.
[0006]
[Problems to be solved by the invention]
In a store that sells CDs, in order to audition the CDs, the CDs are actually played on a CD player and provided to customers using headphones. Sometimes, customers can select any one of a plurality of music CDs, and customers can purchase a CD based on the audition of the CD. Make a decision.
[0007]
In the CD player for trial listening, only one or several CDs are set. For this reason, the listener cannot listen to a CD other than the CD set in the CD player, and the CD or song to be auditioned is limited.
[0008]
In the above listening CD player, one or several CDs can be set in one CD player. Therefore, even if there are several viewers who want to listen to the same song, the next person cannot audition until the person who is currently auditioning the CD player for audition finishes, and the number of people who can audition is limited. Become.
[0009]
Also, in this system, a CD player and headphones are in a one-to-one relationship, and the signal is usually connected by a cable, so a place for audition is inevitably required, and a plurality of CD players for audition are required. It takes up quite a lot of space to install.
[0010]
An object of the present invention is to provide a music distribution apparatus suitable for a music CD sales store or the like in which the problems of the conventional music distribution system described above are improved.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, a music distribution system of the present invention includes a radio base station that transfers music and audio information for each channel to a broadcast area including a plurality of small areas through a plurality of broadcast-type channels , and A radio terminal that receives music and audio information, selects a desired channel and reproduces the music and audio information, and a location information transmission means that transmits location information specifying a plurality of areas within the range covered by the radio base station The wireless terminal includes a receiving unit that receives the location information, and a channel selection unit that selects a channel of the information corresponding to the location information.
[0012]
In the present invention, the music and audio information may include channel information for controlling channel switching timing, and the channel selection means of the wireless terminal may operate in response to the channel information.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows an embodiment of a music distribution apparatus of the present invention. In the figure, 1 is a radio base station, 2 is a radio terminal, and 3 _{1 to} 3 _n are position information transmitters.
[0015]
The wireless base station 1 has a function of transmitting music and voice information through a plurality of broadcast-type channels, and the wireless terminal 2 receives the music and voice information, selects a desired channel, and reproduces the music and voice information. It has the function to do.
[0016]
Positional information transmitter 3 ₁ to 3 _n in broadcast area A, the radio base station 1 covers, transmits the location information for specifying a plurality of small areas A ₁ to A _n.
[0017]
Wireless terminal 2, the in any one of the small areas A ₁ to A _n, channel selection circuit 2a to select a channel of the information corresponding to the positional information transmitted from any of the position information transmitter 3 ₁ to 3 _n Have
[0018]
FIG. 2 shows a configuration example of the radio base station 1. In the figure, 1a is a transmission antenna, 1b is a transmitter, 1c is a data compression circuit, 1d is a memory, 1e is a database, 1f is a controller, 1g is a display unit, and 1h is each channel program.
[0019]
The database 1e is a source of music and sound such as CD and MD. The signal from the database 1e is stored in the memory 1d and then compressed by the data compression circuit 1c and sent to the transmitter 1b. In the transmitter 1b, the signal compressed by each channel program 1h is multiplexed and transmitted to a plurality of channels.
[0020]
As shown in FIG. 3, the wireless terminal 2 returns information corresponding to the small area in response to the position information from the position information transmitter of any small area among the multiplexed information received by the channel selection circuit 2a. After selectively extracting and accumulating in the buffer memory 2b, music and audio information are reproduced by the reproduction circuit 2c.
[0021]
As described above, a music media store such as a CD can listen to desired music, and the purchaser may decide to purchase based on this. The music distribution apparatus of the present invention is suitable as such a trial listening system. As shown in FIG. 4, music and audio are transmitted from the antenna 1a of the radio base station 1 toward the radio terminal 2 used by each viewer 4 with headphones 5 or the like. Send information.
[0022]
Since the information multiplexed by the wireless base station 1 is transferred in this way, a plurality of viewers 4 can simultaneously listen to music of the same or different genres, and the viewer 4 can transfer information wirelessly. Can freely decide when to audition and move. Further, in this case, in the area Ai specified by the position information transmitter 3i, if music of a specific genre is selected, music of various genres can be automatically auditioned by moving each area. it can. Of course, in this case as well, the viewer 4 may select a desired channel by the manual channel selection circuit 2d of the wireless terminal 2 instead of automatically selecting a channel.
[0023]
In addition, the information distributed by the radio base station 1 may include not only music and voice-only data D1 as shown in FIG. 5, but also a data area D2 having channel information for controlling the timing of switching the channels. Good. In this case, the radio terminal 2 switches to the switching destination channel after receiving the information at the time when the channel ahead of the information in the data area D2 is appropriate, that is, if the music is the switching destination, when the switching destination song is completed. It is assumed to have a function. In particular, at this time, as shown in FIG. 6, the viewer 4 can listen to music with natural switching of music by performing processing such as fading out at the time of channel switching.
[0024]
【The invention's effect】
As described above, according to the present invention, it is suitable as a trial listening system for a CD store or the like, and can solve all the problems of the conventional system. Also, not only music information but also various data such as audio information can be inserted as audio information, which is very convenient.
[Brief description of the drawings]
FIG. 1 is a block diagram showing an embodiment of the present invention.
FIG. 2 is a block diagram illustrating a configuration example of a radio base station.
FIG. 3 is a block diagram illustrating a configuration example of a wireless terminal.
FIG. 4 is a conceptual diagram of a trial listening system to which the present invention is applied.
FIG. 5 is a diagram illustrating an example of a frame configuration of music and audio information.
FIG. 6 is an explanatory diagram of fade-out at the time of channel switching.
[Explanation of symbols]
1 Radio base station 2 Wireless terminal 3 Location information transmitter 4 Auditor

Claims (2)

A radio base station that transfers music and audio information for each channel to a broadcast area including a plurality of small areas through a plurality of broadcast-type channels;
A wireless terminal that receives the music and audio information, selects a desired channel, and reproduces the music and audio information;
Position information transmitting means for transmitting position information for identifying a plurality of areas within the range covered by the wireless base station;
With
The music distribution system, wherein the wireless terminal includes receiving means for receiving the position information and channel selecting means for selecting a channel of the information corresponding to the position information.    2. The music and audio information includes channel information for controlling channel switching timing, and channel selection means of the wireless terminal is configured to operate in response to the channel information. Music distribution system.

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