摘要:
A data recording apparatus samples main information signals and records, on a recording medium, a sequence of data consisting of first binary data of an "n" number of bits and second binary data which also consists of the "n" number of bits including additional binary data relative to additional information not exceeding three bits and a predetermined "m" number of bits which do not simultaneously become "0".
摘要:
In an apparatus for recording a data sequence including main binary data of an (m X n) number of bits formed by sampling a main information signal and a plurality of subordinate binary data of also an (m X n) number of bits respectively carrying additional information of varied kinds, recording tracks are formed one after another with data which includes the main binary data representing the main information signal sampled within a given period of time and the plurality of subordinate binary data recorded in each of the tracks; and recording is performed in such a manner that, among the plurality of subordinate binary data, the meaning of information carried by a second n number of bits varies according as the condition of the data varies between a case where l-adic numerical data is arranged to be formed by a first n number of bits within the plurality of subordinate binary data and another case where irregular data is formed there as the l-adic numerical data cannot be formed by the first n number of bits (n and m being integers, respectively, and l being an integer not exceeding 2.sup.n).
摘要:
An apparatus for recording and reproducing information signals on and from a recording medium is arranged to cancel out an instruction for recording an information signal if some information signal has already been recorded on the medium.
摘要:
A reproducing apparatus for reproducing main information from a tape-shaped record bearing medium on which many recording tracks are formed in parallel and additional information recorded along with the main information in a predetermined position within each of a plurality of areas extending in parallel in the longitudinal direction of the medium is arranged to have one operation mode in which the main information and the additional information are reproduced from one of the plurality of areas and another operation mode in which the additional information is solely reproduced from two or more of the plurality of areas.
摘要:
An audio signal recording apparatus comprises a detector for detecting a silent part of an incoming audio signal within the audio signal corresponding to less than a threshold value and generating a detection signal, a circuit for generating a reference signal of a predetermined frequency, a modulator for modulating the incoming audio signal to produce a modulated audio signal, a circuit for superimposing the reference signal on the modulated audio signal in response to the detection signal to produce a recording signal, and a recording circuit for recording the recording signal on a record bearing medium.
摘要:
A data processing device for processing data including a first data sequence indicative of the amplitude of an information signal and a second data sequence each data of which indicates the error rate of each data of the first data sequence. When each data of the second data sequence continuously shows a high error rate of a consecutive number of data of the first data sequence more than a predetermined number, the device generates data of values which are 1/a.sup.k (wherein "k" represents an integer between 1 and "n"; "a" a real number larger than 1; and "n" an integer at least 2) of a data of the first data sequence which has a low error rate and is located before or after the consecutive high error rate data of the first data sequence. The device performs data processing for muting the information signal by using these data.
摘要:
In an information recording and/or reproducing apparatus for recording and/or reproducing a main information signal in or from each of a plurality of areas extending in the longitudinal direction of a tape-shaped recording medium, an additinal information signal which releates to all the signals recorded in the plurality of areas is recorded, separately from the plurality of areas, in a recording track formed on the medium in the longitudinal direction thereof.
摘要:
An audio signal reproducing apparatus for reproducing audio signals from a tape-shaped recording medium on which the audio signals are recorded together with mark signals respectively showing the longitudinal positions of the audio signals along the medium is arranged to detect the moving direction of the medium taken in recording in response to an instruction given to detect one of the mark signals and to search out the mark signals by moving the medium in the direction determined according to the result of the detection.
摘要:
A rotary head type recording and reproducing apparatus of the kind recording information codes on a tape-shaped recording medium by forming many parallel recording tracks and at the same time an additional code consisting of one byte at a predetermined position in each of the recording tracks and reproducing, by means of rotary heads, the signals from the medium, the apparatus is arranged to perform the reproduction as follows; A tracking error signal is formed by using signals reproduced from the rotary head. The tracking error signal is sampled at such a timing that enables the rotary head to reproduce the additional code. The position of the recording medium relative to the rotary head is controlled on the basis of the tracking error signal thus obtained.
摘要:
A data processing device for processing a data sequence obtained by sampling an information signal, is arranged to compute a plurality of data before and/or after an incorrect data amoung the data sequence, to have data obtained by rounding up or rounding off the results of computation at about the same rate, and to replace the incorrect data with the computed data.