Motion video signal processing for recording or reproducing – Local trick play processing – With randomly accessible medium
Reexamination Certificate
2001-04-26
2003-06-17
Tran, Thai (Department: 2615)
Motion video signal processing for recording or reproducing
Local trick play processing
With randomly accessible medium
C386S349000
Reexamination Certificate
active
06580871
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to a device for recording an information signal supplied by a signal source in a record carrier without loss of part of the information signal at the beginning of a recording, comprising processing means for processing the information signal and for supplying a recording information signal, input means for supplying activation information and wait information, and operating means, cooperating with at least a part of the processing means and with the input means, for effecting a recording of a recording information signal in the record carrier in dependence upon the occurrence of the activation information, and for effecting a consecutively overwriting storage of the recording information signal in a temporary store at least in dependence upon the occurrence of the wait information.
The invention further relates to a method of recording an information signal in a record carrier without loss of part of the information signal at the beginning of a recording, the method comprising the steps: processing the information signal and supplying a recording information signal, generating activation information and wait information, recording the recording information signal in dependence upon the occurrence of the activation information, and storing, in a consecutively overwriting fashion, the recording information signal in a temporary store at least in dependence upon the occurrence of the wait information.
2. Description of the Related Art
Such a device of the type defined in the first paragraph and such a method of the type defined in the second paragraph, are known, for example, from European Patent Application No. EP 0 440 017 B1, corresponding to U.S. Pat. No. 5,282,092. The known device includes processing means comprising a receiving device and a temporary store which follows the receiving device and is formed by an endless-loop magnetic tape. The length of the endless-loop magnetic tape dictates the maximum recording time of the temporary store. The known device further includes operating means, also comprising the afore-mentioned temporary store, as well as a recording device for recording recording information signals on a record carrier, the record carrier being formed by a magnetic tape, just as the temporary store, but not by an endless-loop magnetic tape, as in the case of the temporary store.
In the known device, received information signals are recorded in the temporary store as recording information signals and are reproduced from the temporary store delayed by the maximum recording time of the temporary store. The recording information signals, which have been reproduced with a time delay, are recorded on the record carrier. Thus, at the beginning of a recording on the record carrier, this recording being initiated by activation information, the recording information signal, recorded in the temporary store before the occurrence of the activation information and subsequently reproduced from the temporary store, is first recorded on the record carrier for a period of time corresponding to the maximum recording time in the temporary store, and subsequently, the recording information signal, received after the occurrence of the activation information and also recorded in the temporary store and then read from the temporary store, is recorded on the record carrier.
However, it has been found that in the known device, the recording information signals recorded on the record carrier have a signal quality which is degraded in comparison with that of the received information signals, this being attributable to the recording in the temporary store and the subsequent read-out from the temporary store. Moreover, the period of time is fixed by the length of the endless-loop magnetic tape and is limited, so that it is not possible to adapt the period of time to the given application. Furthermore, as a result of the fact that recording information signals are recorded on the record carrier delayed by the period of time, this imposes limitations on the use of the device because the period of time needs to pass before any further steps can be taken. Besides, realizing a temporary store by means of an endless-loop magnetic tape is expensive and complicated.
SUMMARY OF THE INVENTION
It is an object of the invention to preclude the afore-mentioned problems in a device of the type defined in the first paragraph and to improve a device of the type defined in the first paragraph and a method of the type defined in the second paragraph, and provide an improved device and an improved method which guarantee that information signals are recorded without loss of an information signal portion at the beginning of a recording, i.e., at the beginning of a recording process, in a simple manner and by simple means.
According to the invention, in order to achieve this object in a device of the type defined in the first paragraph, an arbitrarily assignable area of the record carrier is selected as temporary store and the operating means starts a consecutively overwriting storage of a recording information signal in an area of the record carrier selected as a temporary store in dependence upon the occurrence of a wait information, and the operating means stops a consecutively overwriting storage of a recording information signal in an area of the record carrier selected as a temporary store, in dependence upon the occurrence of an activation information, and the operating means generates and records a recording information signal which includes information signal packets and address signal packets, the information signal packets corresponding to the information signals and the address signal packets including address information by means of which, during a reproduction of information signal packets recorded in an area of the record carrier selected as temporary store and information signal packets recorded in further areas of the record carrier, the time sequence of the reproduced information signal packets can be defined for the purpose of linking said information signal packets.
By means of the measures in accordance with the invention, it is achieved, in a simple manner, that, as compared with the received information signals, the signal quality of the recording information signals recorded on the record carrier is not degraded as a result of an additional recording process in a separate temporary store and an additional reproduction process from the separate temporary store. Moreover, it is possible to vary the recording time in the temporary store, i.e., the period of time, by selecting or defining an arbitrarily large part of the record carrier as the temporary store, thus enabling the maximum recording time of the temporary store to be adapted to the given case of use, no delayed recording of recording information signals in the record carrier occurs, as a result of which no time limitations are imposed on the use of the device. Furthermore, a substantial cost reduction is achieved in that a separate temporary store is obviated.
In a device in accordance with the invention having the characteristic features defined above, it has proven to be advantageous if, in addition, the operating means generates and records at least one item of linkage address information in dependence upon the occurrence of activation information following the wait information, whereby at least one item of linkage address information, during reproduction of information signal packets recorded in the record carrier, information signal packets reproduced from an area of the record carrier selected as temporary store and further reproduced information signal packets can be linked together in their appropriate time sequence, and by means of which also the first information signal packet recorded in the record carrier in dependence upon the occurrence of activation information can be linked, during reproduction, after the last information signal packet recorded in the area of the record carrier selected as temporary store. Thus, it is achieved, in a simp
Goodman Edward W.
Tran Thai
LandOfFree
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