Abstract: In a video recording/playback apparatus, when recording a series of packets transmitted over an IEEE 1394 bus, a relative value is taken between a requested time of arrival written in a header portion and a cycle time at the time of reception, and then the requested time of arrival is replaced with the relative value. When playing back the series of packets, the relative value is added to a cycle time at the time of transmission, and the relative value is replaced by the obtained value which will be used as a requested time of arrival for playback.

Abstract: During recording, a multilingual indication is generated when at least two of the audio channels of a digital audio signal are associated with a common program, and the multilingual indication is combined with the digital audio signal. During reproduction, a display is activated when a multilingual indication indicates that at least two of the audio channels included in a digital audio signal are associated with a common program.

Abstract: A recording and/or reproducing apparatus includes a microphone, a semiconductor memory, an operating section and a controller. An output signal from the microphone is written in the semiconductor memory and the written signals are read out from the semiconductor memory. The operating section performs input processing for writing a digital signal outputted by an analog/digital converter, reading out the digital signal stored in the semiconductor memory and for erasing the digital signal stored in the semiconductor memory. The control section controls the writing of the microphone output signal in the semiconductor memory based on an input from the operating section and the readout of the digital signal stored in the semiconductor memory.

Abstract: The invention relates to a changeover device which uses both analog and digital signals as input signals and supplies an analog output signal. The changeover device contains a digital-to-analog converter whose output level is adjustable. Matching to the level of the analog input signal is thus achieved. Preferred applications of the invention are picture-in-picture insertions in which an additional picture in analog form is intended to be inserted into a main picture in digital form.

Abstract: In a recording and reproducing apparatus having an image sensor which has photoelectric conversion elements arranged in a two-dimensionally offset manner and a signal processing part which is arranged to include a two-dimensional filter and a frame memory, a circuit is arranged to enable the two-dimensional filter which forms a luminance signal in recording to be used also for reproduction; and a sampling action for a reproducing operation is arranged to be performed in the form of sub-sampling for every field.

Abstract: Data is transferred from a computer to a recording/reproducing device using a sound (audio) card installed in the computer with audio output ports for two channels coupled to the input of the recording/reproducing device. Without any additional changes to the hardware of a typical setup (a computer (desktop, portable, etc.), the sound card installed in the computer and two cables for the output of the sound card), the data is transferred to a player/recorder for recording, for example, information to a recording medium and reproducing the recorded information from the recording medium at any time.

Abstract: An error component such as an eccentricity implicated in an encoder itself is superimposed upon a detected value from an FG due to an assembly error of assemblies themselves and in the manufacturing process. As a result, a speed could not be controlled with a high accuracy and wow and flatter could not be reduced. A tape speed (TSS) signal detected and corrected from the tape transport by FG and PG is inputted into a PLL loop within a data controller (TBC) of a reproducing system. A reproduced signal is converted by an A/D converter in response to a reference clock generated therein and this data is temporarily stored in an FIFO. When this data is reconverted by a D/A converter into an analog signal, if this data is sequentially converted at a timing of an absolute control clock of a quartz oscillator, then it is possible to eliminate the error component superimposed upon the head reproduced signal.

Abstract: A signal reproducing apparatus for prohibiting copying or unauthorized use. The apparatus includes a copying management information decision circuit 19 for discriminating the state of the copying management information read out from each header of a data sector and within the TOC, a protect signal generating circuit 20 for generating a protect signal based on the discrimination signal and a mixing circuit 24 for mixing a protect signal in a vertical blanking period of an analog video signal D/A converted from digital video data reproduced from an optical disc D. The apparatus also includes a descrambling circuit 31 for descrambling the digital data based on the copying management information and a scrambling circuit 32 for descrambling the digital data. The apparatus enables prohibition of unauthorized analog copying and digital copying, inhibition of serial generational copying and prohibition of unauthorized analog and digital copying simultaneously.

Abstract: A recording and/or reproducing apparatus for recording and/or reproducing digital audio signal on a recording medium such as a magnetic tape, which includes a recording and/or reproducing unit, an analog-to-digital convertor, a decimation filter, and noise shaper. The recording and/or reproducing unit records and/or reproduces signal on a recording medium at a speed double relative moving speed of a head and the recording medium at least. The analog-to-digital convertor converts input analog audio signal into digital signal with a sampling frequency which is above the audio frequency band, and sufficiently higher than the maximum frequency capable of recording by the recording and/or reproducing unit. The decimation filter reduces the sampling frequency of the digital signal output from the analog-to-digital convertor, and converts it into digital signal of m-bit (m>n).

Abstract: A first error corrector performs error detection and error correction using inner codes on data subjected to an error correction coding processing with multiplication codes and a second error corrector performs error detection and error correction using outer codes on the data. A condition discriminator discriminates whether or not the data satisfies predetermined conditions, and a controller responds to the discriminator to prevent error detection and error correction using outer codes. Consequently, power for error detection and error correction is consumed only when sufficiently reliable data can be obtained by error detection and error correction using inner codes.

Abstract: An apparatus and method for recording on and reproducing from a magnetic tape a digital signal by rotating heads. A synchronizing signal, a control signal, and an error correction code are added to the digital signal, and the digital signal with those signals added is converted into a block form. At the recording time, a recording signal produced from a recording circuit is recorded on the recording medium by a first head of the rotating heads, and at the same time the recorded signal is reproduced by a second head of the rotating heads. In addition, there are provided a first recording mode in which two error correction codes are added, and a second recording mode in which three error correction codes are added. Thus, the recorded signal can be confirmed by the simultaneous playback made at the recording time so that the reliability in data can be assured.

Abstract: A first rotational head of a first azimuth angle and a second rotational head of a second azimuth angle are arranged on a rotational drum rotated at a constant rotational speed. Also, input digital signals are processed in a signal recording system to form blocks of digital recording signals, a magnetic tape is moved by a tape driving unit according to an information signal generated in a control unit, and the blocks of digital recording signals and the information signal are recorded on the magnetic tape in a recording operation through the first and second heads alternately tracing the magnetic tape. In a reproducing operation, the signals are read through the first and second heads and are reproduced in a signal reproducing system. When the input digital signals are transmitted at a standard data rate, the magnetic tape is rotated at a first traveling speed in the recording and reproducing operations.

Abstract: An information transmission system using data compression and/or error detection includes an information compression circuit for compressing digital information to generate compressed information. A record/reproducing device is provided for recording the compressed information on a recording medium, and reproducing the compressed information from the recording medium. Transmission circuitry is provided for transmitting the compressed information reproduced from the record/reproducing device to a transmission channel without expanding the compressed information. An information expansion circuit is then provided for expanding the compressed information which has been transmitted through the transmission channel in order to reproduce the digital information.

Abstract: A circuit is provided for use with analog to digital conversion techniques in sampled amplitude read channel integrated circuits. A common ADC may be utilized for conversion of both high frequency disk data such as user data and servo data, for example, and for low frequency auxiliary data such as, for example, motor back-EMF current signals. The ADC may utilize the relatively low bit accuracy required for the read channel disk data and through oversampling techniques obtain sufficient conversion accuracy to meet the relatively higher precision requirements for the auxiliary data conversion. The auxiliary data is modified by a ramp signal and the ADC is run on a clock generated from a dithered frequency source so that ADC quantization errors may be randomized.

Abstract: A recording/reproducing method for recording/reproducing digital signals on plural slanted tracks of a tape-shaped recording medium, in which, even if some of the slanted tracks are erased due to junction recording or after-recording, the signals can be reproduced satisfactorily. The input digital signals are divided into upper order bits and lower order bits, and the upper order bits are further divided into upper order side bits and lower order side bits. The data corresponding to the upper order bits, the data corresponding to the upper order side bits of the lower order bits and the data corresponding to the lower order side bits of the lower order bits are recorded in respective different slanted tracks.

Abstract: A device for binary-coding a read signal from a magnetic tape is capable of reading correct digital data by setting an optimum threshold voltage of a comparator which digitalizes an analog read signal. The device includes a binary-coding section 10 which outputs a value "1" when the analog read signal exceeds a predetermined reference threshold voltage, and outputs a value "0" when the analog read signal does not exceed the threshold voltage, and a threshold voltage setting section 20 which increases or decreases the threshold voltage of the binary-coding section 10 by a predetermined amount with respect to a predetermined reference voltage when a record density ID of the magnetic tape is incorrectly binary-coded by the binary-coding section 10.

Abstract: A packet recording/reproducing system is provided which records or reproduces packets on or from tracks formed in time sequence on a magnetic tape. In a recording operation, the packet recording/reproducing system adds to input packets time stamps whose values are synchronous with packet arrival time control clocks produced by the system. The timing with which the packets are recorded on the magnetic tape is controlled by the arrival time control clocks so that a given number of the packets inputted at high data rate are recorded within a one-track area, a two-track area, or a one-track over area defined across at least two of the tracks, thereby minimizing the loss of capacity of the magnetic tape.

Abstract: A recording and/or reproducing apparatus for recording and/or reproducing digital audio signal on a recording medium such as a magnetic tape, which includes a recording and/or reproducing unit, an analog-to-digital convertor, a decimation filter, and noise shaper. The recording and/or reproducing unit records and/or reproduces signal on a recording medium at a speed double relative moving speed of a head and the recording medium at least. The analog-to-digital convertor converts input analog audio signal into digital signal with a sampling frequency which is above the audio frequency band, and sufficiently higher than the maximum frequency capable of recording by the recording and/or reproducing unit. The decimation filter reduces the sampling frequency of the digital signal output from the analog-to-digital convertor, and converts it into digital signal of m-bit (m>n).

Abstract: A read/write data interface (26) is provided that interfaces with a read/write head (28) and is positioned in close proximity to the read/write head (28). The read/write data interface (26) includes a pre-amplifier (46) and a read channel (44). The pre-amplifier (46) amplifies an analog read signal and generates an amplified analog read signal in response. The read channel (44) receives the amplified analog read signal and generates a digital read signal in response.

Abstract: A copyright information embedding system is provided which is designed to embed information for copyright protection into digital audio signals without deterioration of analog audio signals reproduced. The copyright information embedding system includes an A/D converter, a modulator, a level detector, and a copyright data embedding circuit. The A/D converter converts an analog audio signal into a digital signal. The modulator modulates a copyright data signal for the digital signal using spectrum spread. The level detector detects a variation in level of the digital signal. The copyright data embedding circuit divides the copyright data signal into several codes and embeds them into the digital signal each time the variation in level of the digital signal shows a preselected variation such as a rapid rise or drop.

Abstract: The present invention relates to circuitry for processing an analog read signal, such as a signal produced by a magnetoresistive head, in a magnetic data storage system. The circuitry processes the analog signal before the signal reaches the detector which converts the analog signal into a digital signal representative of the data originally stored on the magnetic medium. In one embodiment, the invention comprises circuitry for equalizing the amplitudes of the positive and negative pulses in the analog read signal. In another embodiment, the invention comprises circuitry for reducing the baseline shift of the analog read signal. The invention may be used in magnetic data storage systems using any conventional data detection method.

Abstract: A data processing device 100 uses a portion of a random access memory 111 as an input buffer for holding a portion of a stream of data which is received by an input interface 130. Likewise, a portion of a memory 121 is used as an output buffer for holding a portion of processed data which is output by an output interface 140. A processing unit 110 within the processing device manages the flow of input and output data. The input interface asserts an I/O request 860 when it receives a data word, and the output interface asserts an I/O request 870 when it needs a data word. In response to an I/O request, fast interrupt circuitry inserts a ghost instruction which is formed by doppelganger circuitry into an instruction sequence which is being accessed from a ROM 112. The ghost instruction performs the requested data transfer.

Abstract: An apparatus for recording video data by forming many tracks on a recording medium and/or for reproducing the video data from the tracks is provided with a memory which is arranged to have recording video data or reproduced video data supplied thereto. The apparatus detects the picture change-over portion of the video data obtained within the tracks and controls, in accordance with the detected position, an offset degree between the writing and reading addresses of the memory.

Abstract: A digital video/audio recording and reproducing apparatus comprising a video signal high-efficiency encoder having a variable reduction rate, an audio signal high-efficiency encoder having a variable reduction rate, and a controller for controlling the reduction rates in both of the high-efficiency encoders. The reduction rates in both of the high-efficiency encoders are controlled in such a manner that the sum of the information amount of the video signal and that of the audio signal, after high-efficiency encoding, is maintained constant. When recording multi-channel audio signals, the reduction rates in both of the high-efficiency encoders are controlled according to the number of audio signal channels to be recorded. The high frequency components of the high-efficiency encoded video and audio signals are recorded at the end portions of recording tracks on a magnetic tape, while the low frequency components thereof are recorded in the central portion of the recording tracks.

Abstract: A digital video/audio recording and reproducing apparatus comprising a video signal high-efficiency encoder having a variable reduction rate, an audio signal high-efficiency encoder having a variable reduction rate, and a controller for controlling the reduction rates in both of the high-efficiency encoders. The reduction rates in both of the high-efficiency encoders are controlled in such a manner that the sum of the information amount of the video signal and that of the audio signal, after high-efficiency encoding, is maintained constant. When recording multi-channel audio signals, the reduction rates in both of the high-efficiency encoders are controlled according to the number of audio signal channels to be recorded. The high frequency components of the high-efficiency encoded video and audio signals are recorded at the end portions of recording tracks on a magnetic tape, while the low frequency components thereof are recorded in the central portion of the recording tracks.

Abstract: A video memory device is provided with a memory circuit, a write control circuit for controlling writing to the memory circuit by utilizing the horizontal synchronizing signal of a video signal input to the memory circuit, and a read control circuit for controlling reading from the memory circuit by utilizing the horizontal synchronizing of a video signal output from the memory circuit.

Abstract: A digital video/audio recording and reproducing apparatus comprising a video signal high-efficiency encoder having a variable reduction rate, an audio signal high-efficiency encoder having a variable reduction rate, and a controller for controlling the reduction rates in both of the high-efficiency encoders. The reduction rates in both of the high-efficiency encoders are controlled in such a manner that the sum of the information amount of the video signal and that of the audio signal, after high-efficiency encoding, is maintained constant. When recording multi-channel audio signals, the reduction rates in both of the high-efficiency encoders are controlled according to the number of audio signal channels to be recorded. The high frequency components of the high-efficiency encoded video and audio signals are recorded at the end portions of recording tracks on a magnetic tape, while the low frequency components thereof are recorded in the central portion of the recording tracks.

Abstract: A sector address is obtained even when a playback signal is missed by incrementing the number of interpolations n when determined that error correction of read-out data is not possible, and incrementing and storing in a buffer "address" the contents of a work area B when the number of interpolations n is less than a preset value "Max". When the interpolation address calculation process has been repeated the prescribed number of times "Max" an emergency process is carried out.

Abstract: A digital signal reproducing apparatus includes a reproducing circuit for reproducing from a recording medium a signal, whose amplitude takes on plural values, and which was recorded on the medium by digital modulation of a pilot signal component with digital data, a forming circuit for forming binary data indicative of the plural amplitude values, and a detecting circuit realized by binary data processing circuitry and detecting the pilot signal component on the basis of the binary data.

Abstract: A video data storage apparatus includes a source of video data including a number of video cameras and digitizing circuitry. Two hard disk drives are provided in the apparatus for storing the video data. Also provided in the apparatus is an archive device such as a back-up tape unit. Video data is stored on one of the hard disks, while concurrently video data is copied from the other hard disk onto the tape backup.

Abstract: A data packet which contains time information is time compressed and the time information is extracted from the time compressed data packet. A system clock is synchronized with the extracted time information and is multiplied by a predetermined compression ratio to produce replacement time information which replaces the time information in the time compressed data packet. The time compressed data packet that now contains the replacement time information is modulated and transmitted or recorded.

Abstract: A method and system of representing a signal is disclosed herein. A digital representation of an analog signal is received by a bandwidth detection circuit 14. The digital signal typically, but not necessarily, comes from a analog-to-digital converter 12. The a bandwidth of the signal is determined. The bandwidth is compared to a selected threshold bandwidth. A selected portion of the digital representation is stored in a memory unit 16. The selected portion is determined by a result of the comparison step. A code word is also generated by the bandwidth detection circuit 14 and stored in the memory circuit 16. The original analog signal can be recreated with a decode circuit 20.

Abstract: Apparatus and methods are provided for recording and reproducing digital image data. In a reproducing apparatus, two tracks of digital image data are simultaneously reproduced in a high definition mode of operation, while in a standard definition mode of operation only a single track of data is reproduced at a given time. In the high definition mode of operation, the data reproduced from the two tracks simultaneously are time-division multiplexed and supplied in multiplexed form to a digital interface for transmission to another apparatus, such as a recording apparatus for dubbing. In a recording apparatus, operating in a high definition mode digital image data is recorded simultaneously in two tracks on tape. In one embodiment, the data to be recorded is also multiplexed time-divisionally and supplied to a digital interface for transmission, but in a standard definition mode, the data is not multiplexed prior to transmission.

Abstract: An apparatus for reproducing a digital information signal from a record carrier includes a read unit for reading a signal from a track on the record carrier, a bit detection unit for deriving the digital information signal from the signal read from the track in response to a clock signal and a phase locked loop for deriving the clock signal from the signal read from the track. The phase locked loop includes a phase comparator for deriving a phase error signal and a voltage controlled oscillator for deriving the clock signal. The apparatus further includes a sync pattern detector for detecting sync patterns occurring in the digital information signal and a counter for counting the number of bits occurring between two sync patterns in the digital information signal.

Abstract: A digital signal magnetic recording and reproducing apparatus includes an encoding portion for convolutionally coding an input digital data, a modulating portion for quadrature-amplitude-modulating and phase-shift-keying-modulating the convolutionally coded digital data, a pilot signal mixer for generating a pilot signal and adding it to the modulated signal, and a recording controller for forming a magnetized signal suitable for a magnetic recording medium from the modulated signal mixed with the pilot signal.

Abstract: There is provided an image reproducing apparatus comprises a reproduction circuit for reproducing an image signal which was divided into blocks, an error correction circuit for correcting an error of the image signal reproduced by the reproduction circuit, a constructing circuit for constructing an image signal for the image signal which cannot be corrected by the error correction circuit, and a control circuit for controlling the image signal constructing operation of the constructing circuit on the basis of error correction situations of the blocks which are adjacent to the block including the uncorrectable image signal, wherein a natural image is obtained even for an image of a hard movement and a deterioration of a picture quality can be prevented.

Abstract: A system for a video cassette recorder is capable of recording/reproducing analog video and audio signals as well as digital video and audio signals for a HDTV.The revolution of a head drum may be determined different from each other depending on the selected mode, i.e., digital or analog signal recording/reproducing mode, and thus the digital signal having a different recording bandwidth from the analog signal can be recorded on and reproduced from a conventional analog tape.

Abstract: In a video signal recording apparatus in which video signals are digitized and, after the data arrangement has been transformed, are recorded on a recording medium, the video signals corresponding to one picture are recorded divisionally in a plurality of tracks, and a transforming pattern of the data arrangement is made to change by every one picture of video signals.

Abstract: An audio system is disclosed wherein music cartridges are utilized in a series of cartridge racks for non-mechanical playback and recordation of an entire music collection. The audio signals are stored on music cartridges which are insertable into one of a plurality of cartridge racks. The cartridge racks are operatively connected with the music player of the audio system. The audio system is completely solid state, i.e. it has no moving parts and has the advantages of allowing quick and reliable playback and storage of any music cartridge of the user's entire selection, as desired by the user. The system is self-programmable and expandable, whereby additional cartridge racks can be connected for additional storage of music cartridges allowing any music cartridge from the entire collection to be accessed at anytime.

Abstract: An IC card memory includes a header region for storing information about the IC card memory and information about a format, a chapter attribute table (CAT) region for storing information relating to a single chapter, a cluster index table (CIT) region for storing an address of a single cluster index corresponding to a recorded data block, and a data region for storing digital voice data.

Abstract: An apparatus for reproducing digital information from a recording medium having a plurality of parallel tracks and digital information recorded thereon as n-channel (n being an integer greater than or equal to 2) digital signals. The n-channel digital signals are reproduced by n-reproducing heads. The digital information contained in the reproduced signals is stored in a storage device. Discriminating data is obtained for determining which of the n-channel digital signals reproduced correspond to the reproducing heads. The timing of an access device, accessing the storage device for performing a predetermined processing of the digital signals stored in the storage device relative to the reproducing timing of the digital information reproduced by the n reproducing heads, is controlled in accordance with the discrimination data.

Abstract: A serial data stream representing an image is divided into a plurality of data streams, which are selectively combined to form collected data streams that are respectively blocked, shuffled, orthogonally transformed, variable length encoded, and buffered to form encoded blocks restricted to a predetermined amount of data. The encoded blocks for each of the collected data streams are selectively combined to form channels of record data which are recorded by respective recording heads on tracks of a recording medium using a track shuffling process.

Abstract: Method and apparatus for generating a fully intra-coded video frame from a received progressive refresh bitstream representing a series of inter-coded video frames. Intra-coded macroblocks of received video frames are identified, selected, processed and stored to facilitate later combination into a single fully intra-coded composite video frame suitable for use during VTR trick play operation. As part of the intra-coded macroblock selection process, in various embodiments, the large sets of adjacent macroblocks are given priority over previously selected macroblocks that correspond to non-adjacent positions within a video frame or which correspond to a smaller set of adjacent video frames.

Abstract: Input image data and audio data divided into a plurality of portions are continuously recorded in a solid-state memory. When the audio data is to be reproduced in units of the portions, a reproducing start address of each portion of the audio data is changed in an order different from that in recording, thereby reproducing the audio data. The image data is divided into a plurality of portions corresponding to the plurality of portions of the audio data. The image data is reproduced in units of the portions. At this time, the reproducing start address of each portion of the image data is changed in an order different from that in recording, thereby reproducing the image data. With this arrangement, even when the image and audio data are reproduced in an order different from that in recording, the reproduced audio data can be confirmed.

Abstract: In an information recording-reproducing apparatus for recording and/or reproducing data on an information recording data on medium, the data recorded from the recording data on medium is reproduced by utilization of partial response. The data for each predetermined block is modulated and recorded such that during waveform equalization in the partial response, the number of a plurality of level values present in L samples corresponding to one block of the data may become constant in each block.

Abstract: Digest playback apparatus and method for a VCR. The digest playback apparatus includes a system controller for outputting a plurality of control signals to control the entire operation of a video cassette recorder system, the plurality of control signals including speed-change multispeed and direction data and audio multispeed change mode ON/OFF data. An analog/digital conversion circuit converts an analog audio signal read by an audio head and then restored to its original state into digital audio data regardless of a speed-change mode. A memory stores the digital audio data from the analog/digital conversion circuit.

Abstract: A recording and/or reproducing apparatus for a tape-shaped recording medium to record analog audio signals includes a recording and/or reproducing head, a detecting section, and a compensating section. The head records or reproduces analog signals to or from the tape-shaped recording medium. The detecting section detects any fluctuation in the transporting speed of the tape-shaped recording medium with respect to a rated transporting speed. The compensating section modifies, on the basis of detection results from the detecting section, the analog signals, read out from or to be recorded on the tape-shaped recording medium by the head, so as to compensate for the effect of any fluctuation in the transporting speed of the tape-shaped recording medium with respect to the rated transporting speed before outputting these analog signals or supplying them to the head.

Abstract: A digest variable speed reproducing apparatus for a video cassette recorder (VCR) including a system controller for supplying a desired variable speed data; a control signal detector for detecting a control signal written onto a VCR tape together with an audio signal during digest variable speed reproduction, from the VCR tape; a variable speed controller for supplying A/D conversion execution signal and D/A conversion execution signal and for supplying write control signal or read control signal only when a control pulse is detected by the control signal detector, in response to the variable data from the system controller; an A/D converter for converting a reproduced analog audio signal into a digital signal with a sampling rate corresponding to the variable speed data in response to the A/D conversion execution signal; a D/A converter for reconverting the digital signal read from a memory into an analog audio signal in response to the D/A conversion execution signal; and a memory for writing variable speed

Abstract: An automatic guide-channel mapping method of a VCR for allowing a local broadcasting channel number and a guide channel included in a compressed code to be automatically mapped only by a user's designation of the input of the compressed code and the local broadcasting channel number reserved to be recorded is performed by a compressed code decoding step of decoding the compressed code if the input of said compressed code is completed during a compressed code reserved recording, a mapping determination step of determining whether a guide channel among the decoded compressed code is mapped with a specific local broadcasting channel number or not, and a mapping processing step of supplying a local broadcasting channel number to be subjected to a mapping process when the guide channel is not mapped with the local broadcasting channel number, thereby enabling the guide channel mapping of the compressed code only by an operation once.

Abstract: A video image of one frame is divided into a plurality of super blocks, and each super block comprises a plurality of macro blocks. A video segment comprising five macro blocks taken out from five super blocks located apart from each other on the video image, and data compression operation is applied in the video segment. After data compression, the macro blocks in the video segment are rearranged in the original order, and are formed to corresponding SYNC block data to record on a magnetic tape.