How long is the life of the digital recorder? National standards and product manufacturers did not give accurate standard data. The reporter interviewed Mr.Xu, chief system architect of LOTOO, about the service life of the L-200 digital recorder.
Mr.Xu, chief system architect at LOTOO, said that the original design of the recording product determines the service life, mainly the following:
1, semiconductor components
Semiconductor components are the basic components of products. The semiconductor components of recording products can be divided into two types. One is a civilian-grade semiconductor component. The design concept of a civilian-grade digital recorder is to meet the general needs of consumers and minimize costs. Have market competitiveness. The civilian grade is in line with the daily use of ordinary consumers, but it does not consider the specific conditions of the product, such as temperature, vibration, power supply, special use environment and so on. The other is professional-grade semiconductor components, which are components that meet specific requirements.
For example, the design concept of LOTOOL-200 professional digital recorder is that it does not consider competition at low prices, strictly purchases professional-grade components that meet multiple audio standards, components must meet specific audio professional standards, and L-200 internal semiconductor components. Considering service life, high temperature resistance, low temperature, structural vibration resistance, codec algorithm standard, system stability, microphone sensitivity, total harmonic distortion, sampling frequency, compression bit rate, companding limiter, response frequency, A series of problems such as electrostatic protection and electromagnetic shielding. All hardware and software indicators and parameters must meet the specified parameters, and finally must be tested by the national authority before they can be listed for sale.
Purchase tips:
Consumers should not only look at the propaganda of the product manufacturers, but also carefully check the various audio indicators.
2, product structure
Product structure is the decisive factor that determines product stability and product life. The design, scientific, rigorous, rational and mature design of structure is very important.
Some products look very stylish and sophisticated, but the exquisite appearance must be sacrificed in terms of structural rigor. Consumers should not only look at the appearance, but also the overall structural performance.
For example, the LOTOO technical team has extremely rich experience in product structure design. The product technology designed has passed the inspection of the National Radio and Television Product Quality Supervision and Inspection Center, and won the coolstuff award for technological innovation at the 2005 NAB exhibition in Europe, and it is 2005- 2006 Portable Interviewer Global Sales Champion. And these are all from LOTOO diamond-like product design and quality.
3, memory
In terms of the current mainstream NAND flash memory, it is mainly divided into SLC (SingleLevelCell) and MLC (MultiLevelCell) technologies. The main difference is the way the memory lattice is used. SLC: A single memory cell can be used to memorize 1 data bit and provide fast program programming and reading. Although this method is limited by the low efficiency (Siliconefficiency) problem, resulting in higher cost, its efficiency and reliability are relatively dominant. The number of erasable times is 100,000 times.
MLC: Technology can store two bits of information at a time in a floating gate. Four-layer cells can be generated in a single transistor through memory cell write and sense control.
However, MLC involves the processing of pairs of bits, resulting in a faster disappearance of the charge of the memory cell gate, so it is more serious in terms of power consumption, and at most only about 10,000 write lives, but its production cost is low. Under the circumstance, in order to cope with the current competition trend of flash memory price collapse, manufacturers are now turning to such MLC flash memory. The number of rewritable times is 10,000 times.
The competition in the NAND market is more intense. Samsung and Toshiba are still the market and technology leaders. In order to reduce costs, both Samsung and Toshiba have introduced NANDMLC memory to replace the existing NANDSLC.
For example, LOTOO's existing product memory is SLC memory. In the first quarter of 2007, all manufacturers no longer provide SLC memory, and in the future will be equipped with MLC memory products. The number of MLC memory rewritable times is 10,000 times, which is 90,000 times different from that of SLC. The apparent service life of MLC memory products is only 10% of SLC. How to solve this serious problem?
Mr.Xu, chief system architect of LOTOO Recording Division, took the lead in proposing an "innovate" solution when SLC was mainstream. For the file system, some specific parts must not be damaged. We are in the initial period on the disk. A portion of the space is reserved for backup and repair for these important parts. On the MLC, the Mr.Xu technical team added the logical interval and the physical interval to the original "innovate" technology to adopt the rotation mechanism technology, so as to ensure that the usage of all the blocks of the disk reaches a certain balance.
A simple and simple description is to calculate the actual lifetime of each partition for the 4096 partitions of 1G memory in the initial stage of the system. In the data storage, the "innovate" technology allocates different storage according to the life of each partition. Partitioning, the "innovate" technology divides a limited portion of the space as a backup and repair, protecting some important parts.
Technical details, LOTOO is not just that. LOTOO's design products are designed to be close to perfect for our customers.
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