JPH05508758A - Transmission method of time-varying control variables - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Transmission method of time-varying control variables The invention relates to a method according to the preamble of claim 1.

Such a method is described in “EBU Review-Technical-No.21 8 (August 1986), pages 2 to 12.

Broadcasting - The audio signal has dynamic characteristics (most the magnitude of the difference between the loudest and the softest signal supplied to the transmitter. Ru. The dynamic characteristics of the transmitted signal (this generally refers to the original dynamic characteristics of the recorded acoustic signal) dynamic characteristic) is excessively small.

In order to correspondingly improve the audio signal reproduction, dynamic characteristics can be applied individually to the relevant reproduction points. It is desirable to adapt the information to the listener's wishes. For this, from the program signal It is known to derive the following control variables, i.e. the original dynamic characteristics It is publicly known that the control amount representing limited information to the “target dynamic characteristics” can be derived. Knowledge ("E B U Review - Technical', Nr , 218, August 1986). “Target dynamic characteristics” is a predetermined value, e.g. For example, the limit to 30 dB (this value is smaller than the transmitted dynamic characteristics) It is a request. The above control signal is transmitted in synchronization with the associated program signal and sent to the receiver. evaluated for variable dynamic characteristic selection. The dynamic characteristics The free selection of can be carried out in the following way: by means of the transmitted control variable “ whether the “target dynamic characteristics” are achieved or are further narrowed (automobiles); or the original dynamic characteristics are reshaped under the reverse use of the control signal. It will be done.

M/S coded stereo for transmission of control signals “variable dynamic characteristics” Fixed and variable frequencies can be added to the lower frequency end of the S-signal of an ophonic audio signal. The frequency interval of the above frequencies is instantaneous control amount. It is known to represent the following (DE-PS 33 11 6 46 and DE-PS 33 11 647). Narrow band frequency required for frequency difference demodulation Depending on the filter, rapid changes in the controlled variable are not possible. Furthermore, for control amount transmission The configured frequency range in the S-signal is used for the audio frequency in question. Sufficient interference from noise to ensure reliable transmission due to small signal levels It has no characteristics or susceptibility to influence. In particular, in the case of reception on mobile communications, the frequency Noise occurs in several regions due to multipath path reception.

Based on the above-mentioned serious shortcomings, there is no program signal in the broadcast signal transmission band. Digital transmission of control signals with variable dynamic characteristics is preferred.TV audio For example, as an area without program signals, other digital additional signals can be Blanking area of the image signal already used for teletext is possible. It can be considered as gender. For FM signals, subcarriers in multiplex channels can be used. However, here, under 57KHz, the traffic radio transmitter Identification signals and radio data and Radio Data System (RDS) data streams are transmitted. Additional subcarriers are distributed to broadcast subscribers at the receiving end based on the cost of the decoder. The problem is that it cannot be accepted. RDS data flow or teletext day It is not possible to insert a control signal with “variable dynamic characteristics” into the data flow. This is because those data streams are not transmitted synchronously with the FM or television audio signal. This is a requirement for synchronous transmission of “variable dynamic characteristics” of control signals. It goes against the demands of the government.

The object or problem of the present invention is to provide control signals in spite of asynchronous data flow transmission. The control signal “variable die” ensures the required synchronicity between the program signal and the program signal at the receiving end. The purpose of this invention is to provide a method for transmitting ``dynamic characteristics''.

The above problem is solved by the constituent features of claim 1.

Developments and embodiments of the method according to the invention are described in the dependent claims.

The method of the invention is based on the recognition that the control signal "variable dynamics" ``characteristics'' are coming out of the transmitting studio at the same time (equal time) as the program signal ( Recognize that it leaves the transmitting studio after a certain advance, for example, 1000 mS. Based on. Such progress allows the following method steps to be carried out. This will be explained using an RDS data stream.

An RDS coder at the transmitter receives the control signal and stores it. RDS Co. If there is a free available group (data bit sequence) for the data As soon as the digitized control signal is sent to the group as a data packet, transmitted inside. The 37 net bits available in one group are as follows: can be used for.

32 bits for transmission of control variable “variable dynamic characteristics” 5 bits for identification at the time of transmission The 5 bits above represent how many milliseconds of delay each time in the RDS coder. How much of the progress time was “spent”? Based on the above information This allows the receiver to do the following: Equalized again and converted into individual discrete control signals at regular time intervals, thereby It is possible to form a constant control data stream by converting the above data into a simple shift register. In other words, the entire lead time is compensated and the control data is constant. This allows the data flow to occur again in synchronization with the program signal.

Next, the present invention will be explained in detail using illustrated embodiments.

FIG. 1 is a block diagram of a transmitter device for implementing the method of the invention.

FIG. 2 is a block diagram of a receiving device for implementing the method of the invention.

FIG. 3 shows an apparatus modified from the configuration of FIG. 2 for carrying out the method of the present invention. It is a block connection diagram.

Figures 4a and b are diagrams for explaining the individual steps of the method of the invention. It is mu.

For carrying out the method of the invention, A radio broadcasting studio 10 is shown in the transmitting side equipment schematically shown in FIG. Yes, in this studio 10, the broadcast program signal 11 and the control signal “variable dynamic As mentioned at the beginning, this control signal 12 is a program signal. derived from the number. The important thing is to send the above control signal in studio 10 or before that. A time delay of the program signal 11 with respect to number 12 is performed (this is symbolically represented by the timing element 13 with a constant delay time in FIG. It is that you are. Depending on the delay described above, the control signal 12 may be at the location of the program signal 11. Proceed to the program part of the genus. In Figure 4a, a wireless (radio) broadcast program is shown. For the assumed time course of the program signal, three program portions n, n+1, n+2 are shown, and these program portions have the same time length. Each program From the system part, a control signal “variable dynamic characteristic” is derived, for example from discrete scanning values. Served. The scan value for each program signal portion is as shown in Figure 4-c. data packet in the form of data, with the time of the last scanned value The data packet belonging to , starts in the illustrated example.

Furthermore, it is clear from FIG. 1 that the program and control signals are provided on separate lines 14 It is transmitted via link 15 to transmitter location 16 . In the example shown, the transmitter location 16 is It has an FM transmitter 17 and an RDS coder 18, in which the program signal 11 is transmitted. The advance control signal 12 is supplied to the RDS coder 17. RDS - Korg 18 delays the data packet of control signal 12 by a variable time Δt; into the RDS data stream (see Figures 4-c, e through flg for this). (explained below).

In the variant of Figure 4-d, the data stream stored in the RDS coder 18 is In this sequence, the control signal “variable da Group VD has already been created for inserting “dynamic characteristics”. In Figure 4-d, The cycles shown are groups 0A1VD, 2A10A, VD, 6A, OA%VD.

6A, 2A10A1VD, 6A and 6A.

Data packets of control signals associated with program portions n, n+1, and n+2 The manner in which the insert is inserted is shown in FIG. 4-g. In that case, there will be a free space for inserting control signals. Some of the group VDs in the transmitted data stream that are placed in the (if there is no data packet to be inserted for group VD). In other words , in the case of Figure 4-d, the group with consecutive group numbers 2 and 5 is VD is not sent and, as a result, the origination of the considered data packet with sequence number n At the raw time, data packets 1.3, 4.6 are being transmitted or (Data packet No. 6). Therefore, the next vacant group VD is Group No. 8. Therefore, it is necessary to wait for the insertion of data packet n. (until group N017 is completely transmitted). The above waiting time is shown in Figure 4-e. Then Δt.

It is shown in The same applies to data packets with consecutive numbers n+1, n+2. holds true for t, in which case the waiting time is Δt. 4. Δt. , is shown in Ru. As is clear from the illustrated waiting time, the waiting time is the stored RDS-data flow. differs based on the structure of the may have a spacing of . The assigned program signal portion according to the respective waiting time Δt The advance of the control signal 12 with respect to is reduced to the value τ-Δt. program signal and Since the control signals have to be synchronized at the receiver, the waiting time Δt is The data is detected by the data packet 18, encoded into the corresponding data packet, and transmitted.

The RDS data stream to be transmitted is fed from an RDS coder 18 to a transmitter 17, where it is In this case, the program signal is transmitted in accordance with the standard in the multiplex area on the subcarrier. Ru.

Instead of providing a group VD in the stored column of RDS-groups, FIG. As shown in Figure 4-d and f, it is possible not to perform that type of casting. (as is casually evident from the comparative contrast). The advantage is that RDS coder 1 The sequence (cycle) of groups stored in 8 is more significant than in the case of Figure 4-d. Very small. In the stored sequence of RDS-groups according to Figure 4-d: If you try to insert a data packet, the insertion in question will be inserted into the group that was just sent. at the end of the cycle, where the next group in the cycle is one group's Shifted by connection time. As shown in Figure 4-d, the insertion of the data packet n The entry is made at the end of the group with consecutive numbers in cycle 1, and the Insertion of data packet n+1 into groups with consecutive numbers in cycle 2 The insertion of data packet n+2 is performed at the end of cycle 2, and the insertion of data packet n+2 This is done at the end of the group with number 9. Thereby, when waiting as well Interval Δt1, Δt, odor, Δt,. Mushrooms are obtained, and these waiting times are as per Figure 4-a. It is extremely small compared to the machine time. This means that in addition to the selective embodiment according to Fig. 4f, g. make an advantage.

In the receiving side device schematically illustrated using FIG. 2, the RDS data transmitted at the RDS receiver is The data stream is separated from the radio broadcast program signal and supplied to the RDS decoder 21. . .

and this decoder demodulates and decodes the transmitted RDS data stream. . The decoded RDS-data stream is transferred to stage 22 (which is part of decoder 21). ), where the control signal “variable dynamic characteristics ° separation and evaluation are performed. In this case, each data block contains , information about the waiting time Δt is reproduced, and this information is transmitted via the control signal “variable dynamic It is used for controlling the subsequent buffer memory 23 regarding the buffer characteristics. The control signal appearing at the output of the buffer memory 23 is also the one to which the program signal belongs. The program signal is sent from the receiver 20 to the controlled amplifier 2. 4. by a simultaneous control signal at the control input of the controlled amplifier 24. In this case, the amplification degree of the program signal is changed according to the manual input side 25 of the amplifier 24. As a result, the program is played through the amplifier 26 or headphones (not shown). The program signal can be downloaded manually at the input 25 or according to the individual wishes of the listener. The source of the material has dynamic characteristics. As a result, on the receiving side, the information on the sending side is The method steps of FIGS. 4-a-g are carried out in the opposite direction.

FIG. 3 shows another embodiment of the receiving side, which has the following features: The control signal “variable dynamic It is based on the recognition that only limited capacity can be used for the transmission of Ru. To ensure particularly data-protected transmission in the RDS channel, In the transmitter side memory 27 (this is provided in place of the buffer memory 23 in FIG. 2) In this case, typical control signal profiles are permanently stored. Persistent memorized control In addition to the address of the signal process, the actual The resulting control signal value can be transmitted, which value is stored in the memory 27 as a rhythmic output. For correction and/or initialization, equipment input, program switching, Or it can be used when the control signal is missing. This can be done by the aspects of those methods. The capacity savings of ie, a significant increase in transmission reliability is obtained.

Below circuit block 27 in FIG. 3, an example for a typical control signal course is shown in a table. This is an indication.

・A straight line with a slope of 0 (constant dynamic characteristics) ・A straight line with a positive slope (above) A straight line with a rising dynamic characteristic and a negative slope (a descending dynamic characteristic and a straight line with a negative slope) Jumping signal changes (magnitude, direction, Jumping dynamic characteristic changes over time) α co + OL,, I + OcI %4- Required contract Individual matching of the dynamic characteristics of the radio program signal (variable dynamic characteristics) Therefore, the control parameters are derived from the associated wireless program signal and the program Sent with a signal. At the receiver, the control signal is transmitted through the program signal dynamo. Used to select playback dynamic characteristics that are different from the dynamic characteristics. transmission For this purpose, the control parameters are inserted into the data stream as digital compensation signals, The above data flow is not related to the program signal in the area of the transmission band where there is no program signal. Transmitted synchronously.

international search report “　”’PCr/EP91101202 International Search Report EP 9101202 S^　4B688 H04B 14104 C4101-5 D-8191 Tanning No. 1 Uptstrasse

Claims (8)

[Claims] 1. This is a method of transmitting control amounts that change over time, and the above control amounts are gram signal, is sent along with the program, and is processed by the transmission program at the receiving end. Used for selecting playback dynamic characteristics that are different from the program signal dynamic characteristics. The above control amount is transmitted as a digital additional signal at intervals during the data flow. The data stream is inserted as a data packet in the transmission of the broadcast program signal. Asynchronously with the broadcast program signal in an area of the band where there is no program signal. of said program signal in such a way that the said program signal is transmitted to inserting the digital additional signal into the system signal portion with a variable advance; and the insertion point of each interval of the data packet and the program A variable time difference between the time of occurrence of a signal section is a separate time information and to be transmitted in the above data packet, and furthermore, on the receiving side, the above program The above time difference is used to synchronize the system signal and the advance control signal. A method of transmitting a control variable that changes over time, characterized by: 2. A large number of typical control signal profiles are permanently stored on the receiver side and can be used as control signals. In this case, only the fixedly stored address of the control signal progress mentioned above is transmitted. 2. The method according to claim 1. 3. The control signal value that actually occurs at the boundary of the program signal part is determined by the above fixed value. is transmitted with the address of the signal history stored in the Rizable blank check is performed when equipment is turned on, program is replaced, or control signal failure occurs. request to be used for correction and/or correction and/or initialization. The method described in claim 2. 4. The above digital additional signal is inserted into the data stream of the wireless data signal (RDS signal) and the RDS signal is sent to the multiplexer channel of the FM broadcast (number) program signal. Any one of claims 1 to 3, wherein The method described in section. 5. A data bit string (group) that is periodically repeated in the RDS data stream is Provided for the transmission of control signals, and in the above RDS-data flow, more than the required number number of groups are provided and further occupied by data packets of the digital additional signal. 5. The method according to claim 4, wherein only those groups that have been identified are transmitted. 6. In the above RDS data stream, the data bit string (group) is a digital additional signal. inserted between other groups as necessary to accept data packets of 5. The method according to claim 4, wherein: 7. At the receiver side, the digital additional signal is separated from the data stream and evaluated. 7. The method according to any one of claims 1 to 6. 8. During this evaluation, the waiting time Δt (delta t ) is reproduced, which information corresponds to the control signal “variable dynamic characteristics”. 8. The method as claimed in claim 7, wherein the method is adapted to control a memory (23) for controlling a memory (23).