CN101908938A

CN101908938A - Vehicle-mounted broadcasting equipment

Info

Publication number: CN101908938A
Application number: CN 201010236910
Authority: CN
Inventors: 史岩
Original assignee: Beijing Haier IC Design Co Ltd
Current assignee: Beijing Haier IC Design Co Ltd
Priority date: 2010-07-27
Filing date: 2010-07-27
Publication date: 2010-12-08
Anticipated expiration: 2030-07-27
Also published as: CN101908938B

Abstract

The invention discloses vehicle-mounted broadcasting equipment which comprises a detection and control module, a storage module, a compression module and a selection module, wherein the detection and control module is used for detecting audio signals of important sound channels and respectively sending a first control signal and a second control signal to the selection module and the storage module when the audio signals are detected and the completion of the audio signals of the important sound channels is detected; the storage module is used for storing the audio signals of unimportant sound channels according to the first control signal and sending the stored audio signals of the unimportant sound channels to the compression module according to the second control signal; the compression module is used for compressing the audio signals of the unimportant sound channels according to a previously set compression ratio a and sending the compressed signals to the selection module; and the selection module is used for selecting and playing the audio signals of the important sound channels according to the first control signal, playing the audio signals from the compression module according to the second control signal, selecting and playing the audio signals of the unimportant sound channels when the compression module does not send signals.

Description

Vehicle-mounted broadcasting equipment

Technical field

The present invention relates to a kind of vehicle-mounted broadcasting equipment.

Background technology

In the process that steering vehicle travels, a lot of drivers have formed the custom of broadcast listening.In the process of driving, numerous broadcast programs bring the enjoyment and the Useful Information of driver's happiness.Broadcast receiver is as the standard configuration of automobile, application very extensive.Along with the development of digital technology, be similar to DAB new digital standard such as (Digital Audio Broadcasting, digital audio broadcastings) and also will progressively popularize, also can bring more user.

Yet, along with GPS (Global Positioning System, global positioning system) etc. that uses popularizes, in the time of broadcast listening, often need to listen to some a small amount of but important information, for example, navigation information, the report of road name or overspeed prompting etc., these information often all are very short a few words.In traditional application, we generally can preferentially play important information, and we will lose the non-important information of a part, the continuity when can have influence on driver and passenger's broadcast listening like this.

Summary of the invention

The invention provides a kind of vehicle-mounted broadcasting equipment that can overcome the above problems.

The invention provides a kind of vehicle-mounted broadcasting equipment, comprise important sound channels and non-important sound channels, this vehicle-mounted broadcasting equipment also comprises: detect and control module, be used to detect the audio signal of important sound channels, when the audio signal that detects audio signal and detect important sound channels finishes, send first control signal and second respectively and control signal to and select module and memory module; Memory module is used for according to first control signal audio signal of non-important sound channels being stored, and the audio signal of the non-important sound channels that will store according to second control signal is sent to compression module; Compression module be used for the audio signal of non-important sound channels is compressed according to predefined compression ratio a, and the signal after will compressing is sent to the selection module; Select module, be used for selecting the audio signal of important sound channels to play according to first control signal, and the audio signal from compression module is play, and when not having signal to send, compression module select the audio signal of non-important sound channels to play according to second control signal.

Preferably, in above-mentioned vehicle-mounted broadcasting equipment, memory module adopts the mode of fifo queue that audio signal is stored.

Preferably, in above-mentioned vehicle-mounted broadcasting equipment, compression ratio a 〉=1.

Preferably, in above-mentioned vehicle-mounted broadcasting equipment, memory module comprises: clearing cell is used for that channel when non-important sound channels changes or empty the audio signal that memory module is stored when switching broadcasting.

The above embodiment of the present invention is divided into important sound channels and two parts of non-important sound channels with the two-way audio signal, and the audio signal of important sound channels detected in real time, when important sound channels has audio signal to play, play the audio signal of important sound channels, and store the audio signal of non-important sound channels, after the audio signal for the treatment of important sound channels finishes, the audio signal of the non-important sound channels that will store and follow-up audio signal play back with fast slightly frequency again, thereby reach under the situation of not losing voice data, audio signal to two sound channels is play, the continuity when having guaranteed driver and passenger's broadcast listening.

Description of drawings

Below with reference to accompanying drawings specific embodiments of the present invention is described in detail, in the accompanying drawings:

Fig. 1 is a vehicle-mounted broadcasting equipment schematic diagram according to an embodiment of the invention;

Fig. 2 is the vehicle-mounted broadcasting equipment playing process schematic diagram according to Fig. 1 embodiment.

Embodiment

Fig. 1 is a vehicle-mounted broadcasting equipment schematic diagram according to an embodiment of the invention, and as shown in Figure 1, vehicle-mounted broadcasting equipment comprises: detect and control module 101, memory module 102, compression module 103 and selection module 104.Solid line among Fig. 1 is represented the flow direction of voice data, wherein the important sound channels audio frequency is meant the audio signal of having only a small amount of audio signal information but needing to play in real time, as the GPS navigation order, non-important sound channels audio frequency is meant does not need the non-important audio frequency of broadcast in real time, as the frequency modulation programme signal of broadcasting, and Composite tone is meant the audio signal of final broadcast.Dotted line is represented the control command signal, the audio signal of detection and 101 pairs of important sound channels of control module detects, when having detected the audio signal signal, the audio signal of 102 pairs of non-important sound channels of control store module is stored, and control selects module 104 to select the audio signal of important sound channels to play.Memory module 102 adopts FIFO (First In First Out, first in first out) mode of formation is stored, when detecting and control module 101 when having detected audio signal, just the audio signal with non-important sound channels is stored to formation, and when detecting and control module 101 detects when not having audio signal, if there are not data in the formation, do not do any operation, if data are arranged in the formation, then continue the audio signal of non-important sound channels is stored to formation, the data that to store go out team successively and give compression module 103 simultaneously, when compression module 103 has signal to deliver in memory module 102, according to predefined compression ratio α (α 〉=1), audio signal data is compressed, be about to α times of the frequency raising of audio signal signal and give selection module 104.Select module 104 to be responsible for the selected signals of playing,, select the audio signal of module 104 broadcast important sound channels when detecting and control module 101 when having detected audio signal.When detecting and control module 101 detects when not having audio signal, when compression module 103 has data to send simultaneously, the audio signal of selecting module 104 broadcast compression modules 103 to send.When detecting and control module 101 detects when not having an audio signal compression module 103 not having data to send simultaneously, select the audio signal of the non-important sound channels of module 104 broadcasts.

Present embodiment is by being divided into the two-way audio signal two parts of important sound channels and non-important sound channels, and the audio signal of important sound channels detected in real time, when important sound channels has audio signal to play, play the audio signal of important sound channels, and store the audio signal of non-important sound channels, after the audio signal for the treatment of important sound channels finishes, the audio signal of the non-important sound channels that will store and follow-up audio signal play back with fast slightly frequency again, thereby reach under the situation of not losing voice data, the audio signal of two sound channels is play.Simultaneously, not very responsive because people's ear reacts the slight variations of frequency, do not influence understanding substantially to content.Therefore, in normal broadcasting process, insert important information, realized under the situation that does not lack the broadcast listening content, inserting the purpose of important information by heightening a little method of playing frequency.

Fig. 2 is the vehicle-mounted broadcasting equipment playing process schematic diagram according to Fig. 1 embodiment.As shown in Figure 2, T0-T1 is initial normal condition constantly, and important sound channels has not detected audio signal, and memory module 102 also is empty simultaneously, and compression module 103 is not worked, so select module 104 to play the audio signal of non-important sound channels.T1-T2 constantly, detect and control module 101 when detecting important sound channels audio signal is arranged, control selects module 104 to play the audio signal of important sound channels, simultaneously, control store module 102 is joined the team the data of non-important sound channels, and this moment, memory module 102 did not have audio signal to give compression module 103.T2-T3 constantly, detection and control module 101 detect important sound channels does not have audio signal, simultaneously, memory module 102 has also been stored a part of information, so memory module 102 continues the data of non-important sound channels are joined the team, simultaneously the signal of storing is gone out team and give compression module (103), and issue after compressed module 103 compressions and select module 104 to play, because 103 pairs of data of compression module are compressed, so memory module 102 go out group speed faster than the speed of joining the team, so memory module 102 has become sky to T3 constantly.Therefore, T3-T4 is constantly the same with T0-T1 constantly.Important sound channels has not detected audio signal, and the data in the while memory module 102 also are empty, and compression module 103 is not worked, so select module 104 to select to play the audio signal of non-important sound channels.

Because audio signal file storage amount is less, thus can be so that compression ratio α=1, and at this moment, compression module 103 constant speed are broadcasted audio signal, do not produce the variation of frequency.

In addition, when non-important sound channels is changed platform, and switch when broadcasting (switching between amplitude modulation broadcasting and FM broadcasting), need empty the content in memory module 102 formations.And if the queue full of memory module 102 situation, then also need to empty the content in memory module 102 formations.

Obviously, under the prerequisite that does not depart from true spirit of the present invention and scope, the present invention described here can have many variations.Therefore, the change that all it will be apparent to those skilled in the art that all should be included within the scope that these claims contain.The present invention's scope required for protection is only limited by described claims.

Claims

1. a vehicle-mounted broadcasting equipment comprises important sound channels and non-important sound channels, it is characterized in that, also comprises:

Detect and control module, be used to detect the audio signal of described important sound channels, when the audio signal that detects audio signal and detect described important sound channels finishes, send first control signal and second respectively and control signal to and select module and memory module;

Described memory module is used for according to described first control signal audio signal of described non-important sound channels being stored, and the audio signal of the described non-important sound channels that will store according to described second control signal is sent to compression module;

Described compression module be used for the audio signal of described non-important sound channels is compressed according to predefined compression ratio a, and the signal after will compressing is sent to described selection module;

Described selection module, be used for selecting the audio signal of described important sound channels to play according to described first control signal, and the audio signal from described compression module is play, and when not having signal to send, described compression module select the audio signal of described non-important sound channels to play according to described second control signal.

2. vehicle-mounted broadcasting equipment according to claim 1 is characterized in that, described memory module adopts the mode of fifo queue that audio signal is stored.

3. vehicle-mounted broadcasting equipment according to claim 1 is characterized in that, described compression ratio a 〉=1.

4. vehicle-mounted broadcasting equipment according to claim 1 is characterized in that, described memory module comprises:

Clearing cell is used for that channel when described non-important sound channels changes or empty the audio signal that described memory module is stored when switching broadcasting.